hi everyone

i'm new to this site. I am working on a fairly large sysem wrote in visual fox 5 and keep having an illegal operation error:

STARTUP caused an exception 10H in module VFP500.DLL at 0157:1006583b.
Registers:
EAX=0000000d CS=0157 EIP=1006583b EFLGS=00010246
EBX=0063b8f8 SS=015f ESP=0063b3f0 EBP=0063b958
ECX=00000000 DS=015f ESI=01fde1c0 FS=3d87
EDX=0063b3c8 ES=015f EDI=00000000 GS=0000
Bytes at CS:EIP:
da 4d fc e8 b8 37 fa ff 8b f8 8b 55 fc 8b 0e e8
Stack dump:
01fde1d0 01fde034 00000000 00000000 00000100 00000008 0063b4b0 1005a2a7 0063fe28 00000000 56433230 00000000 0000000a 00000000 6bcdcdc1 00000053

Especially on one particular computer.

Has anyone come across this problem before????

Cheers
Chaz