Problems closing my program!!!

[phoenixbr]

Sometimes, when I close my program I have this message:

Project Project1.exe raised exception class EAccessViolation with message 'Access violation at address XXXXXXXX. Read of address XXXXXXXX'. Process stopped.

And after press ok the program stop at Forms.hpp:

/* TCustomForm.Destroy */ inline __fastcall virtual ~TForm(void) { }