>>
>>I've never heard of this before. Have you checked the variable scoping?
>Yes.
>It just started when one user got a new workstation with NT and then again when another got Win2000. I can run the system fine from a 300+Mzh Win98 and a 120 Win95 workstation but Win NT and Win 2000 crash

Strange. I don't know what you can do as I've never heard of this before.