You're right. I think it was the AutoYield property.

>Can't say with certainty, but I tend to doubt that.
>
>If I recall, you do need to set the Mabry DebugMode property to TRUE or 1 or something like that. That should trigger the DEBUG event to fire, which has a message parameter that you can view, write to a file, etc.
>
>Also, in prior versions of Fox, you needed to set VFP's AutoYield to false...not sure if you still need to do that or not.
>
>What was the specific error that triggered this? Is it an error that results directly from issuing a specific Mabry command?
>
>Kevin