Interpreter closes when called from within C

[japskar]

Hi,
I'm trying to get a GUI on my screen using a TCL/TK script called from C.
So far, no problem as long as I use "tkwait window ." so that my GUI knows that it needs to stay alive as long as the user didn't close it.
However, I often get error messages from TCL83.DLL or KERNEL32.DLL when passing data between C and Tcl.
Although this bothers me, my greatest frustration is, for example, when I press an exitbutton, I get the error:

bgerror failed to handle background error.
Original error:
Error in bgerror: attempt to call eval in deleted interpreter.

And all I do is call a script from C containing:

pack [label .l1 -text {this is a test}];
pack [button .b1 -text {Ok} -command {exit};
tkwait window .

Can someone tell me where I go wrong?

Best regards,
Jasper van Dijk

 

[japskar]

Hmm... more strange behaviour:

pack [label .l1 -text {this is text}];
pack [button .b1 -text {Ok} -command {destroy .}];
tkwait window .

causes an invalid page fault in TCL83.DLL when clicking the OK button.

When run in wish it works fine.