Pedro,

I never use the encryption and never built an exe with an .app inside it. Maybe it's something the exe must do to preserve the (rather limited) encryption integrity of the encrypted .app. I case you didn't know there are third party tools out there that can still read all the code inside an encrypted exe.

>But in fact , i discover what went wrong :
>
> I have a APP in my project , and this app was marked as encrypt (dont ask me why ... ), after i click encrypt off in this APP , all turn back to normal!
>
>Could it be a Bug in VFP5 or just by design ?