Hi,

>>
If he simulates the error in VFP5 the app starts okay. If he simulates the error in 8, the app just hangs. Restarting without the QA tool running gives an "Index does not match table" error.
>>

VFP8 tightened up checks for table corruption which could be ignored in prior versions. This *might* explain what you are seeing. Check SET TABLEVALIDATE in VFP8 help

HTH,
Viv