<PAGE>

                EXHIBIT 10(c) TO SYMIX SYSTEMS, INC. 1998 FORM 10-K
                                          
                               SECOND LEASE AMENDMENT

     This Second Lease Amendment is made and entered into as of the latest date
on which it is executed by either of the parties hereto ("Amendment Date"), by
and between Corporate Exchange Buildings IV and V Limited Partnership, an Ohio
limited partnership, 383 South Third Street, Columbus, Ohio 43215 (the
"Landlord") and Symix Computer Systems, Inc., an Ohio corporation, whose address
is 2800 Corporate Exchange Drive, Columbus, Ohio 43231 (the "Tenant").

                                      RECITALS

     A.   2600 Realty Corp. V, Landlord's predecessor in interest, and Tenant
entered into a lease agreement dated April 3, 1991, a Start Date Agreement dated
October 15, 1992, a Second Lease Amendment dated December 1, 1993, and a Tenant
Acceptance Letter dated December 1, 1993 (collectively, the "Lease"), pursuant
to which Tenant leased certain premises containing approximately 62,118 rentable
square feet of office space (the "Original Premises") located on the second,
third and fourth floors of Corporate Exchange Building V, 2800 Corporate
Exchange Drive, Columbus, Franklin County, Ohio (the "Building").

     B.   Tenant desires to lease additional office space in the Building and to
amend the Lease.

     IT IS, THEREFORE, agreed as follows:

          1.   Tenant hereby leases an additional five thousand six hundred
sixty six (5,666) usable square feet of office space (the "Expansion Space")
located on the lower level of the Building as shown on the floor plan attached
hereto as Exhibit A.

          2.   The term of the lease for the Expansion Space shall commence on
April 1, 1994, shall be concurrent with the Term of the Lease, and shall expire
on June 30, 1996 unless sooner terminated as provided in the Lease.

          3.   Commencing April 1, 1994, the Premises shall be deemed to include
the Expansion Space; and the Premises, including the Original Premises and the
Expansion Space, will contain an aggregate of approximately 67,784 rentable
square feet.

          4.   Tenant shall pay Landlord Base Rent for the Premises in the
amount of Fifty One Thousand Six Hundred Thirty 


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<PAGE>

Two and 83/100 Dollars ($51,632.83) per month, payable in advance on the 
first day of each calendar month, without set off or demand, beginning on 
April 1, 1994, and continuing each calendar month until the expiration of the 
Lease Term.

          5.   Tenant's share of the Operating Expenses for the Expansion 
Space shall be calculated by multiplying the total Operating Expenses (as 
defined in the Lease) by a fraction, the numerator of which shall be the 
number of square feet in the Expansion Space and the denominator of which 
shall be 130,005. Tenant's Pro Rata Share of all Taxes and Operating Expenses 
for the Expansion Space shall be 4.36%.  Tenant's share of the Operating 
Expenses for the Expansion Space shall be payable as Additional Rent in the 
manner, and at such times, as is required by the terms of the Lease.

     Operating Expense charges for all occupied office space in the lower 
level of the Building will be deducted from the total Operating Expenses (the 
"Adjusted Total Operating Expenses").  Operating Expense charges for the 
Original Premises will be calculated in accordance with provisions in the 
Lease, as amended, by multiplying the Adjusted Total Operating Expense by 
Tenant's Pro Rata Share.  Tenant's Pro Rata Share for the Original Premises 
is 51.7%.

          6.   Tenant accepts the Premises in their current condition as far 
as tenant finish and improvements, except for Landlord's obligations to 
repair as set forth in Section 12 of the Lease, and except that Landlord 
shall, at its expense, install panic hardware on the south side of the door 
(the "Emergency Door") separating the Expansion Space from the adjacent space 
as indicated on Exhibit A hereto.  Landlord shall not be required to make 
additional tenant improvements to the Premises.

     Landlord has obtained consent from Digital Equipment Corporation ("DEC") 
for Tenant to use the Emergency Door for emergency egress.  Tenant has 
reviewed and approved the DEC consent.  If Tenant, after good faith efforts, 
is unable to obtain the necessary approval of the appropriate government 
authority that the installation of the Emergency Door meets building code 
requirements, Landlord, at its option, may (a) obtain the governmental 
approval or (b) terminate this Second Lease Amendment by written notice to 
Tenant.  By occupying the Expansion Space, Tenant shall be deemed 
conclusively to have accepted the Premises, including the Expansion Space, 
and to have acknowledged that the Premises are in the condition required by 
the Lease and this Second Lease Amendment.  Tenant shall execute and deliver 
to Landlord an acceptance letter in the form attached as Exhibit B hereto no 
later than April 14, 1994.


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<PAGE>

     Tenant shall indemnify and hold harmless Landlord from and against any 
and all costs, expenses, liabilities, losses, damages, suits, penalties, 
actions, fines, claims, judgements or demands of any kind asserted by or on 
behalf of any person or governmental authority arising out of or in any way 
connected with the use of the Emergency Door pursuant to the terms of Section 
6 of the Lease.

          7.   Except as set forth in this Lease Amendment, all provisions of 
the Lease shall remain unchanged and in full force and effect and shall apply 
to this Lease Amendment.  All terms and conditions of the Lease not 
specifically amended by this Lease Amendment shall apply as if fully 
rewritten herein, and the rights and obligations of Tenant shall be governed 
and controlled by the terms and conditions of the Lease as amended hereby.

          8.   Tenant hereby certifies that no real estate broker has or will 
represent it with regard to the Expansion Space and that no finder's fees 
have been or will be earned by any third party and Tenant shall indemnify and 
hold Landlord harmless from any liability or expense that may arise from such 
claims, including reasonable attorney's fees.

          9.   This Second Lease Amendment shall be construed, governed and 
enforced in accordance with the laws of the State of Ohio.

          10.  This Agreement and the instruments and documents contemplated 
hereby, and the execution and delivery hereof by Tenant, and the consummation 
of the transactions herein provided, have been duly authorized and approved 
by Tenant's Board of Directors and do not violate any provision of the 
constitution or bylaws of Tenant, or any agreement to which Tenant is a party 
or by which Tenant is bound, and constitutes valid and binding obligations of 
Tenant enforceable against it in accordance with their respective terms.  No 
consent or governmental approval is required in connection with the 
consummation of the transactions contemplated hereby.  Tenant represents and 
warrants to Landlord that it has full right, power and authority to enter 
into the transactions provided for in this Second Lease Amendment.

     IN WITNESS WHEREOF, Landlord has executed this Lease Amendment on the 
1st day of April, 1994, and Tenant has executed this Lease Amendment on the 
1st day of April, 1994.


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<PAGE>

                                        LANDLORD: CORPORATE EXCHANGE
                                                  BUILDINGS IV AND V
                                                  LIMITED PARTNERSHIP

 WITNESSES                              By:  Joseph Skilken & Co.,
                                             General Partner

 /s/ Thomas W. Ramag                   By:    /s/ Steve Skilken
 -----------------------------            ---------------------------
                                             Steve Skilken, President
 Print Name: Thomas W. Ramag
             ---------------

 /s/ Julia B. Bolton                    Date: 4-1-94
 -----------------------------               -----------------------

 Print Name: Julia B. Bolton
             -----------------
                                        TENANT:   SYMIX COMPUTER SYSTEMS,
                                                  INC.

                                            
 /s/ Michael C. Wyatt                    By: /s/ Larry J. Fox
 ------------------------------              ----------------------------
                                            Larry J. Fox
Print Name: Michael C. Wyatt                Chairman of the Board and
            -------------------             Chief Executive Officer
                                             
 /s/ Mary E. Burmeister
 ------------------------------
                                        
 Print Name: Mary E. Burmeister         Date: April 1, 1994           
             -------------------              ------------------------

 /s/ Michael C. Wyatt                   By: /s/ Bradford W. Payne
 --------------------------------          ----------------------------
                                             Bradford W. Payne
 Print Name: Michael C. Wyatt                Senior Vice President of
            ---------------------            Finance and Administration
                                             and Chief Financial Officer
 /s/ Mary E. Burmeister
 --------------------------------

 Print Name: Mary E. Burmeister         Date: April 1, 1994
             ---------------------            -------------------------


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<PAGE>

                             NOTARIZATION FOR LANDLORD

STATE OF OHIO
COUNTY OF FRANKLIN

On this 1st day of April, 1994, before me, a notary public in and for said
County and State, personally appeared Steve Skilken, President of Joseph Skilken
& Co., an Ohio Corporation and the General Partner of CORPORATE EXCHANGE
BUILDINGS IV and V LIMITED PARTNERSHIP, an Ohio limited partnership, on behalf
of the limited partnership who acknowledged for and on behalf of the corporation
and limited partnership, that he did sign the foregoing instrument on behalf of
the corporation and limited partnership.

                              /s/ Teresa B. Johnson
                              --------------------------------
                              Notary Public
                              My Commission Expires:  11-1-97
                                                      -------
                                          
                                          
                                          
                         NOTARIZATION FOR CORPORATE TENANT

STATE OF OHIO
COUNTY OF FRANKLIN

On this 1st day of April, 1994, before me, a notary public in and for said
County and State, personally appeared Larry J. Fox, Chairman of the Board and
Chief Executive Officer, and Bradford W. Payne, Senior Vice President of Finance
and Administration and Chief Financial Officer, of SYMIX COMPUTER SYSTEMS, INC.,
an Ohio corporation, who represented that they are duly authorized to sign and
did sign the foregoing lease on behalf of the corporation.


                              /s/ Michael C. Wyatt
                              ----------------------------------
                              Notary Public
                              My Commission Expires:    None
                                                     -----------


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<PAGE>

                      CERTIFICATE OF INCUMBENCY AND RESOLUTION

                                         OF

                            SYMIX COMPUTER SYSTEMS, INC.

I, Michael C. Wyatt, duly elected Secretary of Symix Computer Systems, Inc., an
Ohio corporation (the "Company"), do hereby certify that Larry J. Fox, is the
duly elected and qualified Chairman of the Board and Chief Executive Officer and
Bradford W. Payne is the duly elected and qualified Senior Vice President of
Finance and Administration and Chief Financial Officer of Symix Computer
Systems, Inc. as of the date set forth below, and the signatures set forth
opposite their respective names are the true and genuine signatures of both:

<TABLE>
<CAPTION>
     NAME                               SIGNATURE
<S>                                     <C>
     Larry J. Fox                       /s/ Larry J. Fox
                                       ------------------------
     

     Bradford W. Payne                  /s/ Bradford W. Payne
                                       ------------------------
</TABLE>

  I, Michael C. Wyatt, further certify that the following is a true and correct
copy of the resolution duly adopted by unanimous written consent of the Board of
Directors of Symix Computer Systems, Inc. on November 30, 1993 and that
there are no modifications, additions or rescissions thereto:

     RESOLVED, that the Chairman of the Board and Chief Executive Officer and
     Senior Vice President of Finance and Administration and Chief Financial
     Officer be and hereby are authorized and empowered to execute in the name
     of and to deliver on behalf of the Company any and all documents relating
     to real estate transactions including, but not limited to, leases,
     subleases, and purchase and sale documents, and amendments and supplements
     thereto, and specifically that they are authorized and empowered to enter
     into a lease amendment with Corporate Exchange Buildings IV and V Limited
     Partnership for additional office space at Corporate Exchange Building V.


                                      69

<PAGE>

IN WITNESS WHEREOF, the undersigned has hereunto set (his) hand and affixed the
seal of the Company on this 1st day of March, 1994.


                                   SYMIX COMPUTER SYSTEMS, INC.

(CORPORATE SEAL)


                                   By: /s/ Michael C. Wyatt, Secretary
                                      ---------------------------------


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<PAGE>

                                     EXHIBIT B

                              TENANT ACCEPTANCE LETTER

                               [Letterhead of Tenant]

                                                                     [Date]


Corporate Exchange Buildings IV and V Limited Partnership
383 South Third Street
Columbus, Ohio  43215
Attention: Steve Skilken

Re:  Lease Dated April 3, 1991, First Lease Amendment Dated December 1, 1993,
     and Second Lease Amendment Dated April 1, 1994, at Corporate Exchange
     Building V, 2800 Corporate Exchange Drive, Columbus, Ohio 43231

The undersigned, as Tenant, hereby confirms the following as of April 1,
1994:

     1.   Tenant has accepted possession of and is currently occupying the
          entire Premises.

     2.   The commencement date for the Second Lease Amendment is
          April 1, 1994.

     3.   All alterations and improvements required to be performed by Landlord
          pursuant to the terms of the Lease, the First Lease Amendment, and the
          Second Lease Amendment to prepare the Premises for Tenant's occupancy
          have been satisfactorily completed.

     4.   As of the date hereof, Landlord has fulfilled all its obligations
          under the Lease.

     5.   The Lease is in full force and effect and has not been modified,
          altered, or amended except pursuant to the instruments described
          above.

     6.   There are no offsets or credits against Rent or any other charge
          payable by Tenant under the Lease, nor has any Rent or any other
          charge payable by Tenant been prepaid.

     7.   Tenant has no notice of any prior assignment, hypothecation, or pledge
          of the Lease or any Rent due under the Lease.

                                     Sincerely,

<PAGE>

                              SYMIX COMPUTER SYSTEMS, INC.


                              By:  /s/ Larry J. Fox
                                 ------------------------------
                                   Larry J. Fox
                                   Chairman of the Board and
                                   Chief Executive Officer


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