>I work for a software company writing bespoke software for various firms using Visual FoxPro 5.0.
>
>On one particular client site, one of their machines is continually performing an illegal operation and closes the program when running our program. The other machines are unaffected and are running the same program on the same spec machine.
>
>The error message has been faxed over to ourselves and reads as follows:
>---------------------------------------------------------------------------------------------------------------------------
>STARTUP caused an exception 10H in module VFP500.DLL at 0157:10063139.
>Registers:
>EAX=0000000d CS=0157 EIP=10063139 EFLGS=00010246
>EBX=0063ae74 SS=015f ESP=0063a96c EBP=0063aed4
>ECX=00000000 DS=015f ESI=02035b00 FS=26c7
>EDX=0063a944 ES=015f EDI=00000000 GS=0000
>
>Bytes at CS: EIP:
>da 4d fc e8 05 9a fa ff 8b 55 fc 8b 0e e8
>
>Stack dump:
>02035aa0 02035974 00000000 00000004fd 00000000
>00000008 00000000
>00000000 00000000 00000000 00000000 000004fd
>00000002c 00000000 a077ebc0 00000000
>
>---------------------------------------------------------------------------------------------------------------------------
>If you have any idea on what this means or how to solve the problem I would be very grateful.
>Thanks... Graham Errington./

Have you tried a scan disk? Also, try deleting all temp files that don't get cleaned up when the app crashes. Make sure that all PCs are running the same version of the video and printer drivers.