Problem with Software in DECWindows

[Alan Nakamoto]

I'm trying to put my finger on a problem we are having with a piece of
software. We are currently running Ultrix 3.1D (Worksystem V2.2) on
color 3100's and model 5000 DECstations. The software runs in a
graphical window providing pop up menus and it's own windowing
environment inside of a DECwindow or MOTIF window.

The problem that we're having occurs during mouse events. When the mouse
button is clicked to bring up a pop up menu or to select an item, or moved 
outside of the host window to the DECwindow background, the software
seems to hang. The mouse can be moved around but the system no longer
responds to any button clicks at all. Thus, the session manager cannot
be selected, or anything. The only escape is to kill the dxsession. The
interesting thing is that the problem only occurs on model 5000s. The
3100's have never experienced the problem with the same software (the
software is run from an NFS mount on a 5000 server). Also, this seems to
be a random event, everything will work fine on the 5000 for sometimes
minutes, or sometimes hours without hanging up.

I was wondering if anyone might have a thought about this. Is such a
problem likely to be with the application software or would it be a
windowing/OS problem on the 5000. If so, would upgrading to Ultrix 4.0
provide a solution. Any hints or thoughts welcome.

Thanks,

Alan Nakamoto                              nakamoto at eric.mpr.ca
Pacific Microelectronics Centre          uunet!ubc-cs!mpre!nakamoto
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