Problem with window_destroy of Sunview in Sun4

[Vijay Ruhela]

I just tried to port an application in sunview from Sun3 to Sun4.
Everywhere I have window_destroy(..) the program crashes.
It does not crash at the point where I call window_destroy
but after some time.
If I avoid destroying windows and only hide them it works fine.
But then I run out of window descriptors to open new windows.
Did anybody had any such problem. If yes please tell me way out.
Is it a bug in sunview? or I am doing something wrong.
Application runs perfectly fine in Sun3.
Thanks

Vijay