<PAGE>
              EXHIBIT 10(h) TO SYMIX SYSTEMS, INC. 1998 FORM 10-K
                                       
                AMENDMENT TO THE PROGRESS SOFTWARE APPLICATION 
                               PARTNER AGREEMENT

This AMENDMENT to the PROGRESS SOFTWARE APPLICATION PARTNER AGREEMENT is 
entered into as of July 1, 1997 (the "Effective Date"), by and between 
PROGRESS SOFTWARE CORPORATION, a Massachusetts corporation with its principal 
place of business at 14 Oak Park, Bedford, Massachusetts 01730 ("PSC"), and 
SYMIX COMPUTER SYSTEMS, INC., an Ohio corporation with its principal place of 
business at 2800 Corporate Exchange Drive, Columbus, Ohio 43231 ("AP" or 
"Symix").

WHEREAS, PSC and AP entered into a Progress Software Application Partner 
Agreement effective as of February 8, 1995 (the "Agreement");

WHEREAS, PSC and AP desire to amend the terms and conditions of the Agreement 
to provide for special pricing for certain PSC products to be distributed in 
conjunction with certain AP PROGRESS-Registered Trademark--based 
applications; and

WHEREAS, PSC is willing to provide AP with such special pricing subject to 
the terms and conditions of this Amendment;

NOW, THEREFORE, for good and valuable consideration, the receipt and adequacy 
of which is hereby acknowledged, the parties hereto agree as follows:

1.   Capitalized terms used but not defined in this Amendment shall have the
     same meaning as in the Agreement.
     
2.   The following terms as used herein shall have the following meanings:
     
     a)   "NET LICENSE FEE" shall mean the then-current total license fee
          charged by AP to each customer for the Symix portion of the AP Covered
          Applications bundled with the Selected PSC Products in accordance with
          Section 6 below, net of any and all discounts, sales tax and shipping
          fees.  The term "Net License Fee" shall not include revenue obtained
          by AP for hardware, implementation, training, customization, data
          conversion services, 1st year Annual License Fee ("Annual License Fee"
          is the name used by AP to refer to its maintenance and support
          services fee), or support services.  For illustration purposes only,
          see EXHIBIT C for example order and calculations.
     
     b)   "SELECTED PSC PRODUCTS" shall mean the PSC Versions 7 and 8 deployment
          products listed in EXHIBIT A.
     
     c)   "COVERED APPLICATIONS" shall mean the PROGRESS-Registered 
          Trademark--based AP application software modules listed in EXHIBIT B 
          to this Amendment.


                                      13
<PAGE>

3.   PSC PRODUCT LICENSES DISTRIBUTED BY AP PRIOR TO THE EFFECTIVE DATE OF THIS
     AMENDMENT.  Except as otherwise set forth in Sections 8, 9 and 10 of this
     Amendment, the terms and conditions set forth in this Amendment shall not
     apply to PSC product licenses distributed by AP to its existing installed
     base prior to the Effective Date of this Amendment.  Such PSC product
     licenses shall be subject to PSC's standard end-user license agreement
     which accompanied the PSC product and PSC's then-current standard
     maintenance and upgrade policies and price list.  Notwithstanding the
     foregoing, in the event AP licenses additional Covered Applications to an
     existing AP customer such additional licenses (with or without additional
     Selected PSC Products) shall be subject to the terms and conditions set
     forth in this Amendment including but not limited to the PSC Product and
     Maintenance Royalty requirements specified herein.

4.   AP'S DISTRIBUTION OF SELECTED PSC PRODUCTS DURING THE TERM OF THIS
     AMENDMENT.  Notwithstanding anything to the contrary contained in the
     Agreement, the following terms and conditions shall apply to the
     distribution by AP of the Selected PSC Products in connection with the
     Covered Applications during the term of this Amendment:

     a)   TERRITORY.  AP shall have the right to distribute the Selected PSC
          products solely in conjunction with the deployment of the Covered
          Applications in North America subject to the terms and conditions of
          the Agreement and this Amendment.

     b)   AP PRICING.  AP will, in its sole discretion, establish and maintain a
          product price schedule setting forth the license fees for the Covered
          Applications.  A copy of the current price schedule is attached hereto
          as EXHIBIT B.  AP shall provide PSC with written notice of any updates
          to the above-mentioned price schedule in a timely fashion. 
          Notwithstanding the foregoing, the special pricing terms and
          conditions set forth in this Amendment are based upon AP's pricing
          model set forth in EXHIBIT B.  In the event AP makes substantial
          changes to its pricing model from the one set forth in EXHIBIT B, AP's
          license royalty fee and maintenance fee for the Selected PSC
          Product(s) deployed under such new pricing model shall be subject to
          change in PSC's sole discretion provided, however, that in no event
          shall such formulas be significantly different from the formulas set
          forth herein.

     c)   AP'S AGREEMENT WITH ITS CUSTOMERS.  The use of the Selected PSC
          Products by AP's customers shall be subject to the terms and
          conditions set forth in PSC's End-User Product License Agreement (a
          copy of which is attached hereto as EXHIBIT D).

     d)   PSC LICENSE ROYALTIES.  AP shall pay PSC a royalty equal to seventeen
          percent (17%)(the "Product Royalty") of the total sales price for the
          Symix portion of the Covered Application(s) licensed to its customers
          on or after the Effective Date of this Amendment, less any applicable
          customer discount.  The 17% royalty described in the foregoing
          sentence is based upon the following royalties:


                                      14
<PAGE>
          (1)  14.5% of the total sales price for the Symix portion of the
               Covered Application as payment for the initial product license,
               and
          
          (2)  2.5% of the total sales price for the Symix portion of the
               Covered Application as payment for an initial 12 month term of
               generally available PSC maintenance.

          In the event AP pays royalties to PSC for initial license, initial
          maintenance and upgrade fees in excess of $1,920,000 in any one year
          period beginning on July 1st of each year and ending on June 30th of
          the following year, the royalty rate on such license and upgrade fees
          will drop from 17% to 16% during the remainder of such one year
          period.  Except as otherwise set forth herein, PSC's license fees for
          any additional PSC Products ordered but not listed in EXHIBIT A will
          be calculated by using PSC's then-current price list less applicable
          Symix discount.

     e)   PSC MAINTENANCE ROYALTIES.

          i)   INITIAL MAINTENANCE TERM.  In connection with AP's initial
               distribution of Selected PSC Products in conjunction with each AP
               license of Covered Application(s) to an AP customer, PSC
               maintenance coverage for such Selected PSC Products during the
               initial maintenance term shall be subject to royalties specified
               in Section 4(d) above.  The above-mentioned fee is based upon a
               twelve (12) month initial maintenance term.
          
          ii)  RENEWAL MAINTENANCE TERM.  For each AP Covered Application
               license, upon expiration of an initial term of maintenance as 
               described in paragraph (i) of this Section 4(e) or a renewal 
               term of maintenance as described in this paragraph (ii) of 
               this Section 4(e), PSC's maintenance coverage for a twelve 
               (12) month renewal term shall be subject to royalty equal to 
               two and one-half percent (2.5%) of the original sales price 
               charged by AP for the Symix portion of such Covered 
               Applications.  If AP increases the maintenance fee for any 
               Covered Application after such Covered Application has been 
               purchased by the customer, the annual maintenance royalty for 
               such Covered Application described in this paragraph (ii) of 
               this Section 4(e) will automatically be increased by the same 
               percentage; provided, however, that in no event shall (a) the 
               amount of any such maintenance royalty for the second 
               maintenance term be less than the maintenance royalty for the 
               initial maintenance term, and (b) the amount of any such 
               annual maintenance royalty for the third maintenance term and 
               any subsequent maintenance term be less than the royalty paid 
               by AP for the previous maintenance term.  The maintenance fee 
               for renewal maintenance for AP customers who have allowed 
               their maintenance to lapse is subject to the terms and 
               conditions of PSC's then-current standard maintenance renewal 
               policy and then-current pricing.

                                      15
<PAGE>

     f)   UPDATES/UPGRADES OF THE COVERED APPLICATIONS.  For each Selected PSC
          Product license purchased for an AP customer pursuant to Section 4(d)
          above, PSC shall be entitled to payment from AP when additional
          application and/or maintenance revenue is generated from such AP
          customer in connection with (i) the sale or license of additional
          Covered Applications or (ii) any applicable upgrade or update to the
          Covered Applications and/or the Selected PSC Products (including but
          not limited to revenue relating to the license of additional Covered
          Application modules, upgrades or updates to existing modules and
          increase in user count.  PSC's portion of such revenue shall be based
          upon the then-current product royalty and maintenance royalty formulas
          in effect at the time of the applicable update, upgrade or license of
          additional Covered Applications.  AP shall include information about
          any such PSC product and/or maintenance royalties in accordance with
          the reporting requirements of Section 7 herein.

5.   The special pricing provisions set forth in this Amendment apply only to
     the Selected PSC Products distributed solely in conjunction with AP's
     Covered Applications for installation in North America, in accordance with
     the terms and conditions of this Amendment and the Agreement.  In the event
     a new AP customer or existing AP customer desires to purchase a new PSC
     product license or upgrade an existing PSC product license for a PSC
     product not included in the definition of Selected PSC Products listed
     above or covered in Sections 8, 9 or 10 hereof, the PSC license and
     maintenance fees for such new PSC product license or upgrade shall be
     subject to PSC's then-current price list, terms, and conditions.

6.   If AP elects to separate the fees charged by AP for PSC Products from the
     fees charged for the Symix portion of the Covered Applications when
     submitting proposals or invoicing AP's customers, AP (i) must show only the
     suggested list price for the application-specific versions of the PSC
     Products as calculated in accordance with the formula set forth on
     EXHIBIT E hereto, and (ii) must not discount the PSC Products more than the
     discount given by AP on the Symix portion of the Covered Applications.  PSC
     may amend the suggested list prices for the application-specific version of
     the PSC Products from time to time by providing prior written notice to AP.
     The special pricing terms and conditions set forth in this Amendment shall
     not apply if AP discounts the bundled application software, together with
     the Selected PSC Products, at a percentage higher than the average discount
     applied to the total sale to its customers on any particular order.  Under
     such circumstances, the PSC product licenses shall be subject to PSC's
     then-current price list.

7.   ORDERING AND PAYMENT PROCEDURES.

     a)   On a monthly basis, AP shall provide the following reports to PSC:

          i)   COVERED APPLICATION(S) DEPLOYMENT REPORT.  For each Covered
               Application(s) license granted by AP to an AP customer under the
               terms and conditions of this Amendment during the report period,
               AP shall provide PSC with the following information:  the
               customer name, address, 


                                      16
<PAGE>

               number of users, PSC serial number, AP's Net License Fee, PSC's 
               Product Royalty calculated in accordance with Section 4(e) above.
          
          ii)  INITIAL TWELVE (12) MONTH MAINTENANCE REPORT.  For each Covered
               Application(s) license including Selected PSC Products to be
               covered under a twelve (12) month initial PSC maintenance term
               (provided such maintenance is made generally available by PSC to
               its customer base), AP shall provide the following information: 
               the customer name, address, PSC serial number, AP's Net License
               Fee, maintenance start and end date, and PSC's Maintenance
               Royalty calculated in accordance with Section 4(0(i) above.
          
          iii) RENEWAL MAINTENANCE REPORT.  For each Covered Application(s)
               license including Selected PSC Products to be covered under a
               twelve (12) month annual PSC renewal maintenance term (provided
               such maintenance is made generally available by PSC to its
               customer base), AP shall provide the following information:  the
               customer name, address, PSC serial number, maintenance start and
               end date, and PSC's Maintenance Royalty calculated in accordance
               with Section 4(f)(ii) above.
          
          iv)  UPGRADES/UPDATES.   On a monthly basis, AP shall provide a report
               to PSC of any and all add-on modules, updates or upgrades
               occurring during the report period to AP customer licenses for
               Covered Applications and/or Selected PSC Products resulting in
               additional license and/or maintenance revenue to AP in accordance
               with the provisions of Section 4(f) above and shall include the
               following information with respect to each such update, add-on
               and/or upgrade:  customer name; address; PSC serial number(s);
               description of the update, upgrade or add-on; PSC Product Royalty
               (if additional license revenue is generated from the update, 
               add-on or upgrade); and PSC Maintenance Royalty (if additional
               maintenance revenue is generated from the update, add-on or
               upgrade).
          
          v)   The required reports referenced in paragraphs (i), (ii), (iii),
               and (iv) above shall be received by PSC no later than the
               fifteenth (15) day of the month following the month in which the
               Covered Application(s) license is granted by AP or one of its
               authorized distributors.  Payment in full for all of PSC's
               Product Royalties, Maintenance Royalties (initial and renewal),
               and update/upgrades owed to PSC for the prior month are due with
               these reports.  Interest shall accrue on any delinquent amounts
               owed by AP for PSC products at the lesser of eighteen percent
               (18%) per annum or the maximum rate permitted by applicable usury
               law.

8.   AP's existing customers who have purchased PROGRESS-Registered 
     Trademark--based Symix applications which incorporate 
     PROGRESS-Registered Trademark-Version 6 or an earlier 
     PROGRESS-Registered Trademark- version ("Earlier PROGRESS-Registered 
     Trademark- Versions") prior to the Effective Date of this Amendment, may 
     upgrade from such applications to the Covered Applications if (i) AP 
     pays to PSC for each such 


                                      17
<PAGE>

     existing customer a one-time fee equal to One Hundred and Fifty Dollars 
     ($150.00) per user based upon a user count that is equal to the total 
     number of such customer's Symix users, (ii) AP pays to PSC an annual 
     maintenance royalty for each such application equal to the greater of 
     (a) two and one-half percent (2.5%) of the total current sales price 
     charged by AP for such application, or (b) the current maintenance fee 
     charged by PSC for such application, (iii) such existing Symix customer 
     has paid all required maintenance fees on such products due prior to the 
     date of such upgrade, and (iv) each such existing customer forfeits 
     their rights under the machine-based license or unlimited license 
     granted to such customer for the Earlier PROGRESS-Registered Trademark- 
     Versions and the license to use such products shall be based upon number 
     of users.  If such Symix customers require any other PSC products other 
     than those included with the Covered Applications, such products must be 
     purchased at PSC's then current list price less Symix's standard AP 
     discount.

9.   AP's existing customers who have purchased PROGRESS-Registered 
     Trademark--based Symix applications which incorporate 
     PROGRESS-Registered Trademark-Version 7 or 8 will be covered under the 
     percentage of application arrangement described in this Amendment and 
     such customers will not be charged PSC's standard platform and upgrade 
     fees for platform changes to such applications.
     
10.  AP's customers who have purchased the Covered Applications will receive
     free of charge Updates (as such term is hereinafter defined) to the PSC
     Products included with Covered Applications provided that (a) the user
     count for such Covered Applications has not been increased, and (b) the
     customer has purchased maintenance services for the Covered Applications. 
     For purposes of this Section 10, "Updates" shall mean new releases of PSC
     Products containing modifications or additions to the software that fixes
     bugs or provides minor functionality enhancements and does not change
     overall utility, functional capability or application of software.

11.  Notwithstanding anything to the contrary set forth in Section 10.1 of the
     Agreement, (a) the term of the Agreement shall be extended so that the
     Agreement terminates on July 1, 1998 unless extended in writing by AP and
     PSC, and (b) the initial term of this Amendment shall commence on July 1,
     1997 and shall continue for a period of one year from such date. 
     Thereafter, the provisions of this Amendment shall continue in force
     subject to termination (a) automatically upon termination of the Agreement
     pursuant to Article 10 of the Agreement or (b) thirty (30) days after
     written notice of termination by either party.  If in excess of ninety
     percent (90%) of the outstanding common stock of PSC is acquired by a third
     party software vendor during the initial term of this Amendment or any
     renewal term hereof, the term of this pricing arrangement shall be
     automatically extended for an additional two-year period from the next
     anniversary date hereof.  In the event PSC terminates this Amendment in
     accordance with part (b) above, AP's distribution of all PSC products,
     including the Selected PSC Products described herein shall be subject to
     the standard terms and conditions of the Agreement (prior to this
     Amendment) and PSC's then-current pricing policies.  Nothing in this
     Section 11 shall alter or modify PSC's right, pursuant to Section 10.2 of
     the Agreement, to terminate the Agreement and this Amendment at any time if
     AP fails to cure a material breach of its obligations within thirty (30)
     days of receipt of written notice from PSC.


                                      18
<PAGE>

12.  Notwithstanding anything to the contrary set forth in Section 11.1 of the
     Agreement and except as set forth in Section 10 of this Amendment, the
     special pricing and distribution terms and conditions set forth in this
     Amendment may not be assigned by AP without the prior written consent of
     PSC, which shall not be unreasonably withheld.

13.  It is the expectation of Symix and PSC that Symix will pay royalties to PSC
     for initial license, initial maintenance and upgrade fees of at least
     $1,920,000 in each one year period during the term of this Amendment
     beginning on July 1st of each year and ending on June 30th of the following
     year.

14.  Except as modified herein, all provisions of the Agreement are hereby
     confirmed and in all respects this Amendment (including Exhibits A through
     E hereto) and the Agreement shall be read and construed together as if the
     provisions of this Amendment had been part of the Agreement.  This
     Amendment completely supersedes any earlier Agreements between the parties.
     No other modifications or additions are made to the Agreement.  Except as
     may be modified or amended by this Amendment, the terms and conditions of
     the Agreement shall remain in effect until termination of the Agreement. 
     In the event of conflict between the terms and conditions of the Agreement
     and this Amendment, the terms and conditions of this Amendment shall
     govern.

IN WITNESS WHEREOF, this Amendment has been executed under seal for and on 
behalf of each of the parties hereto by their duly authorized representative 
as of the date first set forth above.


PROGRESS SOFTWARE CORPORATION           SYMIX COMPUTER SYSTEMS, INC.


By: /s/ Paul Maddaluno                  By: /s/ Lawrence DeLeon
    ---------------------------            ----------------------------

Name:  Paul Maddaluno                   Name: Lawrence DeLeon
      -------------------------              --------------------------

Title:  Director, N.A. Sales            Title:  CFO
        -----------------------                ------------------------


                                      19
<PAGE>
                                  EXHIBIT A



                            SELECTED PSC PRODUCTS
                                       
                      PROGRESS-Registered Trademark- 4GL
                                       
          PROGRESS-Registered Trademark- Enterprise Database Server
                                       
                                Query/Results
                                       
                              Client/Networking
                                       
                   PROGRESS-Registered Trademark- AppServer



                                      20
<PAGE>

                                EXHIBIT B

                     COVERED APPLICATIONS/PRICE SCHEDULE

                                   SyteLine


                               Data Collection

                                  Symix 4.0

     The Covered Applications will only include a single user 4GL license for 
each database server and a user count equal to the number of Symix SyteLine 
and Symix Data Collection sessions for Enterprise Database, Client 
Networking, PROGRESS-Registered Trademark- AppServer and Query/Results.



                      [Attach Current AP Price Schedule]
                             (Attachment omitted)



                                      21
<PAGE>

                                  EXHIBIT C

                        EXAMPLE ORDER AND CALCULATIONS

     If AP sells customer ABC company $130,000 in Covered Applications of 
which the sales price for the Symix portion of such Covered Applications is 
$100,000, AP would pay to PSC a royalty of $17,000 calculated as follows:



<TABLE>
     <S>  <C>                                                          <C>
     a.   14.5% of the total sales price for the Symix portion 
          of the Covered Applications for the initial product 
          license                                                      $14,500
            
     b.   2.5% of the total sales price for PSC maintenance 
          during the Initial Maintenance Term                            2,500
                                                                       -------
          TOTAL ROYALTY DUE PSC                                         $17,000
</TABLE>

                                      22
<PAGE>

                                   EXHIBIT D


       [This page will be replaced by a copy of PSC's End-User Product License 
                                   Agreement]



                                      23
<PAGE>


                                  EXHIBIT E

                FORMULA FOR CALCULATING SUGGESTED LIST PRICE


The suggested list price of the PSC Products included with any Covered 
Application shall be calculated as follows:

               $1,200 per user for the Enterprise Database Server, Client 
               Networking, Query/RESULTS and PROGRESS-Registered Trademark- 
               App Server and one 4GL Development System.

                                      24