Goin' crazy with a windows error!!!

[Giovanni Cannizzaro]

Hi all.

As object I'm going really crazy with an error causin a Windows crash.
No way to trace it.
I got it randomly (or it seems to be).
"try ... end try" can't intercept it.
Really ugly.

Here u can find the windows' report of the error:

http://pastebin.com/D9qyJ4ud

And here is the scenario:
I use a really simple datagrid (table format, populated with the dgText) 
in a stack called in the modal way.
Before the modal call of the stack I open the stack invisible, populate 
the dataGrid and re-close it in this way:

open inv stack "nStack"
set the dgText of grp "myDG" of stack "nStack" to myText
close stack "nStack"
set the vis of stack "nStack" to true
modal stack "nStack"

I know it's not simple to help me but I really don't know what really 
cause the error...
See u and TY