>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.

You're not really giving much information here, such as what the program is doing when this occurs. However, you're in luck; I recognize the evil and dreaded exception 10H as a problem described in this KB article. If changing the printer driver isn't an option, try using _fpreset as described in the article.