>Ed,
>
>Thanks for your suggestion but it's too simply, I want to add the routine in my foxpro´s library, The idea is to detect the problem automatically in the system and try to solved itself. Could you help me ?

I'm not aware of a tool of the caliber of FoxFix for SCO Unix, SDT is ruled out because it's not VFP, and I'm not sure if Doug Hennig ever did a port of SDD (Stonefield Data Dictionary), his earlier toolkit that grew into SDT, for SCO. You're pretty much stuck with a dead platform and an unsupported environment.