<PAGE>   1

    As Filed With the Securities and Exchange Commission on November 23, 1999
                                                  Registration No. 333-

--------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington. D.C. 20549

                                   ----------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                   ----------

                           EPICOR SOFTWARE CORPORATION
             (Exact name of registrant as specified in its charter)

           Delaware                                     33-0277592
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
 incorporation or organization)

               195 Technology Drive, Irvine, California 92618-2402
               (Address of Principal Executive Offices) (Zip Code)

                                   ----------

                   KEY EMPLOYEE NONQUALIFIED OPTION AGREEMENT
                            (Full title of the plan)

                                   ----------

                    L. George Klaus, Chief Executive Officer
                           Epicor Software Corporation
                              195 Technology Drive
                          Irvine, California 92618-2402
                     (Name and address of agent for service)

                                 (949) 585-4000
          (Telephone number, including area code, of agent for service)

                                   Copies to:
                              Perry Tarnofsky, Esq.
                           Epicor Software Corporation
                              195 Technology Drive
                          Irvine, California 92618-2402

<PAGE>   2

                         CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------
                                                  Proposed maximum        Proposed maximum
  Title of securities       Amount to be           offering price        aggregate offering         Amount of
   to be registered        registered (1)          per share (2)              price (2)          registration fee
------------------------------------------------------------------------------------------------------------------
<S>                        <C>                    <C>                    <C>                     <C>
  Common Stock, $.001          375,000                 $12.8125              $4,804,688             $1,335.70
       par value               shares

------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)      This Registration Statement covers an aggregate of 375,000 shares of
         Common Stock which may be issued pursuant to the Nonqualified Option
         Agreement, dated as of December 31, 1998, between Registrant (formerly
         named Platinum Software Corporation) and Stuart W. Clifton (the "Plan")
         together with such additional shares of such Common Stock as may be
         issued to the holder of such options pursuant to anti-dilution
         provisions.

(2)      In accordance with Rule 457(h), the aggregate offering price of 375,000
         shares of Common Stock registered hereby which would be issued upon
         exercise of options granted under the Plan is based upon the per share
         exercise price of such options of $12.8125.


                                       2
<PAGE>   3

                                     PART II
               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


Item 3.  Incorporation of Documents by Reference.

         The following documents have been filed by the Registrant with the
Securities and Exchange Commission (the "Commission") and are incorporated
herein by reference:

         (a) The Registrant's Transition Report on Form 10-K for the transition
period from July 1, 1998 to December 31, 1998.

         (b) Registrant's Quarterly Reports on Form 10-Q for the quarters ended
March 31, 1999, June 30, 1999, and September 30, 1999.

         (c) Registrant's Current Reports on Form 8-K dated April 26, 1999, July
7, 1999, July 29, 1999, and October 21, 1999.

         (d) All other reports filed by the Registrant pursuant to Sections
13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), since the end of the fiscal year covered by the annual report referred to
in (a) above.

         (e) The description of the Registrant's Common Stock, which is
contained in the Registrant's registration statement on Form 8-A filed on
October 15, 1992 pursuant to Section 12 of the Exchange Act, including any
amendment or report filed for the purpose of updating such description.

         All documents subsequently filed by the Registrant pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to the filing of a
post-effective amendment to the registration statement which indicates that all
of the shares of Common Stock offered have been sold or which deregisters all of
such shares then remaining unsold, shall be deemed to be incorporated by
reference in the registration statement and to be a part hereof from the date of
the filing of such documents; except as to any portion of any future annual or
quarterly report to stockholders or document that is not deemed filed under such
provisions. For the purposes of this registration statement, any statement
contained in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded to the extent that a
statement contained herein or in any other subsequently filed document which
also is or is deemed to be incorporated by reference herein modifies or
supersedes such statement. Any such statement so modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
registration statement.

Item 4.  Description of Securities.

         Not applicable.

Item 5.  Interests of Named Experts and Counsel.

         Not applicable.


                                      II-1
<PAGE>   4

Item 6.  Indemnification of Directors and Officers.

         (a) As permitted by the Delaware General Corporation Law, the Second
Restated Certificate of Incorporation eliminates the liability of directors to
the Registrant or its stockholders for monetary damages for breach of fiduciary
duty as a director, except to the extent otherwise required by the Delaware
General Corporation Law.

         (b) The Amended and Restated Certificate of Incorporation provides that
the Registrant will indemnify each person who was or is made a party to any
proceeding by reason of the fact that such person is or was a director or
officer of the Registrant against all expense, liability and loss reasonably
incurred or suffered by such person in connection therewith to the fullest
extent authorized by the Delaware General Corporation Law. The Registrant's
Amended and Restated Bylaws provide for a similar indemnity to the Registrant's
directors and officers to the fullest extent authorized by the Delaware General
Corporation Law.

         (c) The Registrant has entered into indemnification agreements with
each of its directors and executive officers. The indemnification agreements
provide for the indemnification of directors and executive officers of the
Registrant against any and all expenses, judgments, fines, penalties and amounts
paid in settlement, to the fullest extent permitted by law.

Item 7.  Exemption from Registration Claimed.

         Not Applicable.

Item 8.  Exhibits.

         4.1      Nonqualified Option Agreement, dated as of December 31, 1998,
                  between Epicor Software Corporation (formerly named Platinum
                  Software Corporation), and Stuart W. Clifton.

         5.1      Opinion of Wilson, Sonsini, Goodrich & Rosati.

         23.1     Consent of Wilson, Sonsini, Goodrich & Rosati (included in
                  Exhibit 5.1).

         23.2     Consent of Ernst & Young LLP, Independent Accountants.

         24.1     Power of Attorney (included on the signature page to the
                  Registration Statement - see pages II-4 and II-5).

Item 9.  Undertakings.

         (a)      The undersigned Registrant hereby undertakes:

                  (1) To file, during any period in which offers or sales are
                  being made, a post-effective amendment to this registration
                  statement:

                           (i) To include any prospectus required by Section
                           10(a)(3) of the Securities Act of 1933 (the
                           "Securities Act");

                           (ii) To reflect in the prospectus any facts or events
                           arising after the effective date of the registration
                           statement (or the most recent post-effective
                           amendment


                                      II-2
<PAGE>   5

                           thereof) which, individually or in the aggregate,
                           represent a fundamental change in the information set
                           forth in the registration statement;

                           (iii) To include any material information with
                           respect to the plan of distribution not previously
                           disclosed in the registration statement or any
                           material change to such information in the
                           registration statement;

         provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not
         apply if the registration statement is on Form S-3 or Form S-8, and the
         information required to be included in a post-effective amendment by
         those paragraphs is contained in periodic reports filed by the
         Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act
         that are incorporated by reference in the registration statement.

                  (2) That, for the purpose of determining any liability under
                  the Securities Act, each such post-effective amendment shall
                  be deemed to be a new registration statement relating to the
                  securities offered therein, and the offering of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

                  (3) To remove from registration by means of a post-effective
                  amendment any of the securities being registered which remain
                  unsold at the termination of the offering.

         (b) The undersigned Registrant hereby undertakes that, for purposes of
         determining any liability under the Securities Act, each filing of the
         Registrant's annual report pursuant to Section 13(a) or Section 15(d)
         of the Exchange Act (and, where applicable, each filing of an employee
         benefit plan's annual report pursuant to Section 15(d) of the Exchange
         Act) that is incorporated by reference in the registration statement
         shall be deemed to be a new registration statement relating to the
         securities offered therein, and the offering of such securities at that
         time shall be deemed to be the initial bona fide offering thereof.

         (c) Insofar as indemnification for liabilities arising under the
         Securities Act may be permitted to directors, officers and controlling
         persons of the Registrant pursuant to the foregoing provisions, or
         otherwise, the Registrant has been advised that in the opinion of the
         Commission such indemnification is against public policy as expressed
         in the Act and is, therefore, unenforceable. In the event that a claim
         for indemnification against such liabilities (other than the payment by
         the Registrant of expenses incurred or paid by a director, officer or
         controlling person of the Registrant in the successful defense of any
         action, suit or proceeding) is asserted by such director, officer or
         controlling person in connection with the securities being registered,
         the Registrant will, unless in the opinion of its counsel the matter
         has been settled by controlling precedent, submit to a court of
         appropriate jurisdiction the question whether such indemnification by
         it is against public policy as expressed in the Act and will be
         governed by the final adjudication of such issue.


                                      II-3
<PAGE>   6

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-8 and has duly caused this
registration statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Irvine, State of California, on the 11th day of
November, 1999.


                                       EPICOR SOFTWARE CORPORATION



                                       By /s/ L. George Klaus
                                          --------------------------------------
                                          L. George Klaus
                                          Chairman of the Board, Chief Executive
                                          Officer and President


                                      II-4
<PAGE>   7

                                POWER OF ATTORNEY

         We, the undersigned officers and directors of Epicor Software
Corporation, do hereby constitute and appoint L. George Klaus and Lee Kim, or
either of them, our true and lawful attorneys-in-fact and agents, each with full
power of substitution and resubstitution, for him and in his name, place and
stead, in any and all capacities, to sign any and all amendments to this
Registration Statement, and to file the same, with exhibits thereto, and other
documents in connection therewith, with the Securities and Exchange Commission,
granting unto said attorneys-in-fact and agents, and each of them, full power
and authority to do and perform each and every act and thing requisite are
necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that each of said attorney-in-fact and agents, or his substitute or substitutes,
may lawfully do or cause to be done by virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

<TABLE>
<CAPTION>
              Signature                            Title                             Date
              ---------                            -----                             ----
<S>                                    <C>                                 <C>

      /s/ L. George Klaus              Chairman of the Board,
     ---------------------------       Chief Executive Officer and         November 11, 1999
     L. George Klaus                   President


     /s/ Lee Kim                       Vice President, Chief Financial
     ---------------------------       Officer (Principal Accounting and   November 11, 1999
     Lee Kim                           Financial Officer)


     /s/ Arthur J. Marks               Director                            November 11, 1999
     ---------------------------
     Arthur J. Marks


     /s/ L. John Doerr                 Director                            November 11, 1999
     ---------------------------
     L. John Doerr


     /s/ Donald R. Dixon               Director                            November 11, 1999
     ---------------------------
     Donald R. Dixon
</TABLE>


                                      II-5

<PAGE>   8

                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit                                                                             Sequential
Number                                 Description                                  Page Number
------                                 -----------                                  -----------
<C>          <S>                                                                    <C>
  4.1        Nonqualified Option Agreement, dated as of December 31, 1998,
             between Epicor Software Corporation (formerly named Platinum
             Software Corporation) and Stuart W. Clifton.

  5.1        Opinion of Wilson, Sonsini, Goodrich & Rosati.

 23.1        Consent of Wilson, Sonsini, Goodrich & Rosati (included in Exhibit
             5.1).

 23.2        Consent of Ernst & Young LLP, Independent Accountants.

 24.1        Power of Attorney (included on the signature page to the
             Registration Statement - see pages II-4 and II-5).
</TABLE>


                                      II-6
[{"type": "S-8", "sequence": "1", "description": "FORM S-8", "secsgml_size_bytes": 17504}]
{"company-data": {"conformed-name": "EPICOR SOFTWARE CORP", "cik": "0000891178", "assigned-sic": "7372", "irs-number": "330277592", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-91505", "film-number": "99762932"}, "business-address": {"street1": "195 TECHNOLOGY DR", "city": "IRVINE", "state": "CA", "zip": "92718-2402", "phone": "9495854000"}, "mail-address": {"street1": "195 TECHNOLOGY DR", "city": "IRVINE", "state": "CA", "zip": "92718-2402"}, "former-company": {"former-conformed-name": "PLATINUM SOFTWARE CORP", "date-changed": "19940715"}}
1

    As Filed With the Securities and Exchange Commission on November 23, 1999
                                                  Registration No. 333-

--------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington. D.C. 20549

                                   ----------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                   ----------

                           EPICOR SOFTWARE CORPORATION
             (Exact name of registrant as specified in its charter)

           Delaware                                     33-0277592
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
 incorporation or organization)

               195 Technology Drive, Irvine, California 92618-2402
               (Address of Principal Executive Offices) (Zip Code)

                                   ----------

                   KEY EMPLOYEE NONQUALIFIED OPTION AGREEMENT
                            (Full title of the plan)

                                   ----------

                    L. George Klaus, Chief Executive Officer
                           Epicor Software Corporation
                              195 Technology Drive
                          Irvine, California 92618-2402
                     (Name and address of agent for service)

                                 (949) 585-4000
          (Telephone number, including area code, of agent for service)

                                   Copies to:
                              Perry Tarnofsky, Esq.
                           Epicor Software Corporation
                              195 Technology Drive
                          Irvine, California 92618-2402
2

                         CALCULATION OF REGISTRATION FEE
------------------------------------------------------------------------------------------------------------------
                                                  Proposed maximum        Proposed maximum
  Title of securities       Amount to be           offering price        aggregate offering         Amount of
   to be registered        registered (1)          per share (2)              price (2)          registration fee
------------------------------------------------------------------------------------------------------------------
Common Stock, $.001          375,000                 $12.8125              $4,804,688             $1,335.70
       par value               shares

------------------------------------------------------------------------------------------------------------------
(1)      This Registration Statement covers an aggregate of 375,000 shares of
         Common Stock which may be issued pursuant to the Nonqualified Option
         Agreement, dated as of December 31, 1998, between Registrant (formerly
         named Platinum Software Corporation) and Stuart W. Clifton (the "Plan")
         together with such additional shares of such Common Stock as may be
         issued to the holder of such options pursuant to anti-dilution
         provisions.

(2)      In accordance with Rule 457(h), the aggregate offering price of 375,000
         shares of Common Stock registered hereby which would be issued upon
         exercise of options granted under the Plan is based upon the per share
         exercise price of such options of $12.8125.

                                       2
3

                                     PART II
               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.  Incorporation of Documents by Reference.

         The following documents have been filed by the Registrant with the
Securities and Exchange Commission (the "Commission") and are incorporated
herein by reference:

         (a) The Registrant's Transition Report on Form 10-K for the transition
period from July 1, 1998 to December 31, 1998.

         (b) Registrant's Quarterly Reports on Form 10-Q for the quarters ended
March 31, 1999, June 30, 1999, and September 30, 1999.

         (c) Registrant's Current Reports on Form 8-K dated April 26, 1999, July
7, 1999, July 29, 1999, and October 21, 1999.

         (d) All other reports filed by the Registrant pursuant to Sections
13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), since the end of the fiscal year covered by the annual report referred to
in (a) above.

         (e) The description of the Registrant's Common Stock, which is
contained in the Registrant's registration statement on Form 8-A filed on
October 15, 1992 pursuant to Section 12 of the Exchange Act, including any
amendment or report filed for the purpose of updating such description.

         All documents subsequently filed by the Registrant pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to the filing of a
post-effective amendment to the registration statement which indicates that all
of the shares of Common Stock offered have been sold or which deregisters all of
such shares then remaining unsold, shall be deemed to be incorporated by
reference in the registration statement and to be a part hereof from the date of
the filing of such documents; except as to any portion of any future annual or
quarterly report to stockholders or document that is not deemed filed under such
provisions. For the purposes of this registration statement, any statement
contained in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded to the extent that a
statement contained herein or in any other subsequently filed document which
also is or is deemed to be incorporated by reference herein modifies or
supersedes such statement. Any such statement so modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
registration statement.

Item 4.  Description of Securities.

         Not applicable.

Item 5.  Interests of Named Experts and Counsel.

         Not applicable.

                                      II-1
4

Item 6.  Indemnification of Directors and Officers.

         (a) As permitted by the Delaware General Corporation Law, the Second
Restated Certificate of Incorporation eliminates the liability of directors to
the Registrant or its stockholders for monetary damages for breach of fiduciary
duty as a director, except to the extent otherwise required by the Delaware
General Corporation Law.

         (b) The Amended and Restated Certificate of Incorporation provides that
the Registrant will indemnify each person who was or is made a party to any
proceeding by reason of the fact that such person is or was a director or
officer of the Registrant against all expense, liability and loss reasonably
incurred or suffered by such person in connection therewith to the fullest
extent authorized by the Delaware General Corporation Law. The Registrant's
Amended and Restated Bylaws provide for a similar indemnity to the Registrant's
directors and officers to the fullest extent authorized by the Delaware General
Corporation Law.

         (c) The Registrant has entered into indemnification agreements with
each of its directors and executive officers. The indemnification agreements
provide for the indemnification of directors and executive officers of the
Registrant against any and all expenses, judgments, fines, penalties and amounts
paid in settlement, to the fullest extent permitted by law.

Item 7.  Exemption from Registration Claimed.

         Not Applicable.

Item 8.  Exhibits.

         4.1      Nonqualified Option Agreement, dated as of December 31, 1998,
                  between Epicor Software Corporation (formerly named Platinum
                  Software Corporation), and Stuart W. Clifton.

         5.1      Opinion of Wilson, Sonsini, Goodrich & Rosati.

         23.1     Consent of Wilson, Sonsini, Goodrich & Rosati (included in
                  Exhibit 5.1).

         23.2     Consent of Ernst & Young LLP, Independent Accountants.

         24.1     Power of Attorney (included on the signature page to the
                  Registration Statement - see pages II-4 and II-5).

Item 9.  Undertakings.

         (a)      The undersigned Registrant hereby undertakes:

                  (1) To file, during any period in which offers or sales are
                  being made, a post-effective amendment to this registration
                  statement:

                           (i) To include any prospectus required by Section
                           10(a)(3) of the Securities Act of 1933 (the
                           "Securities Act");

                           (ii) To reflect in the prospectus any facts or events
                           arising after the effective date of the registration
                           statement (or the most recent post-effective
                           amendment

                                      II-2
5

                           thereof) which, individually or in the aggregate,
                           represent a fundamental change in the information set
                           forth in the registration statement;

                           (iii) To include any material information with
                           respect to the plan of distribution not previously
                           disclosed in the registration statement or any
                           material change to such information in the
                           registration statement;

         provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not
         apply if the registration statement is on Form S-3 or Form S-8, and the
         information required to be included in a post-effective amendment by
         those paragraphs is contained in periodic reports filed by the
         Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act
         that are incorporated by reference in the registration statement.

                  (2) That, for the purpose of determining any liability under
                  the Securities Act, each such post-effective amendment shall
                  be deemed to be a new registration statement relating to the
                  securities offered therein, and the offering of such
                  securities at that time shall be deemed to be the initial bona
                  fide offering thereof.

                  (3) To remove from registration by means of a post-effective
                  amendment any of the securities being registered which remain
                  unsold at the termination of the offering.

         (b) The undersigned Registrant hereby undertakes that, for purposes of
         determining any liability under the Securities Act, each filing of the
         Registrant's annual report pursuant to Section 13(a) or Section 15(d)
         of the Exchange Act (and, where applicable, each filing of an employee
         benefit plan's annual report pursuant to Section 15(d) of the Exchange
         Act) that is incorporated by reference in the registration statement
         shall be deemed to be a new registration statement relating to the
         securities offered therein, and the offering of such securities at that
         time shall be deemed to be the initial bona fide offering thereof.

         (c) Insofar as indemnification for liabilities arising under the
         Securities Act may be permitted to directors, officers and controlling
         persons of the Registrant pursuant to the foregoing provisions, or
         otherwise, the Registrant has been advised that in the opinion of the
         Commission such indemnification is against public policy as expressed
         in the Act and is, therefore, unenforceable. In the event that a claim
         for indemnification against such liabilities (other than the payment by
         the Registrant of expenses incurred or paid by a director, officer or
         controlling person of the Registrant in the successful defense of any
         action, suit or proceeding) is asserted by such director, officer or
         controlling person in connection with the securities being registered,
         the Registrant will, unless in the opinion of its counsel the matter
         has been settled by controlling precedent, submit to a court of
         appropriate jurisdiction the question whether such indemnification by
         it is against public policy as expressed in the Act and will be
         governed by the final adjudication of such issue.

                                      II-3
6

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-8 and has duly caused this
registration statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Irvine, State of California, on the 11th day of
November, 1999.

                                       EPICOR SOFTWARE CORPORATION

                                       By /s/ L. George Klaus
                                          --------------------------------------
                                          L. George Klaus
                                          Chairman of the Board, Chief Executive
                                          Officer and President

                                      II-4
7

                                POWER OF ATTORNEY

         We, the undersigned officers and directors of Epicor Software
Corporation, do hereby constitute and appoint L. George Klaus and Lee Kim, or
either of them, our true and lawful attorneys-in-fact and agents, each with full
power of substitution and resubstitution, for him and in his name, place and
stead, in any and all capacities, to sign any and all amendments to this
Registration Statement, and to file the same, with exhibits thereto, and other
documents in connection therewith, with the Securities and Exchange Commission,
granting unto said attorneys-in-fact and agents, and each of them, full power
and authority to do and perform each and every act and thing requisite are
necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that each of said attorney-in-fact and agents, or his substitute or substitutes,
may lawfully do or cause to be done by virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
Signature                            Title                             Date
              ---------                            -----                             ----
/s/ L. George Klaus              Chairman of the Board,
     ---------------------------       Chief Executive Officer and         November 11, 1999
     L. George Klaus                   President

     /s/ Lee Kim                       Vice President, Chief Financial
     ---------------------------       Officer (Principal Accounting and   November 11, 1999
     Lee Kim                           Financial Officer)

     /s/ Arthur J. Marks               Director                            November 11, 1999
     ---------------------------
     Arthur J. Marks

     /s/ L. John Doerr                 Director                            November 11, 1999
     ---------------------------
     L. John Doerr

     /s/ Donald R. Dixon               Director                            November 11, 1999
     ---------------------------
     Donald R. Dixon
II-5
8

                                  EXHIBIT INDEX
Exhibit                                                                             Sequential
Number                                 Description                                  Page Number
------                                 -----------                                  -----------
4.1        Nonqualified Option Agreement, dated as of December 31, 1998,
             between Epicor Software Corporation (formerly named Platinum
             Software Corporation) and Stuart W. Clifton.

  5.1        Opinion of Wilson, Sonsini, Goodrich & Rosati.

 23.1        Consent of Wilson, Sonsini, Goodrich & Rosati (included in Exhibit
             5.1).

 23.2        Consent of Ernst & Young LLP, Independent Accountants.

 24.1        Power of Attorney (included on the signature page to the
             Registration Statement - see pages II-4 and II-5).
II-6