1. Have all users exit Sage 100 ERP.
2. Stop the Sage 100 ERP Application Service.
3. Open …MAS90\Home\Lib_AppServ.
4. Rename these files:
   • apps.pvk → apps.old
   • locate.pvk → locate.old
   • server.pvk → server.old
   • sessions.pvk → sessions.old
5. Open ...MAS90\Home.
6. Double-click pvxwin32.exe.
7. Click OK.
8. Type: o=new("sy_installation")
   •  NOTE: The command starts with an "o" (as in oxygen), not a zero. 
9. Press Enter.
10. Type: o'configuremas200("C:\Sage...\MAS90")
    •  CAUTION: Enter the correct path to the MAS90 directory on the client’s system. The command starts with an "o" (as in oxygen), followed by a single quote. 
11. Open Start, All Programs, Sage, Sage 100 ERP, Application Server Configuration.
12. Select the Server tab.
13. Enter the Socket (Port) number.
14. Deselect the KeepAlives option.
15. Select Apply.
16. Select Exit.
17. Start the Sage 100 ERP Application Service.

"Error #26: Variable type invalid" when stopping Application Server or Service