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Problem with Screen Environment

• To: mathgroup at smc.vnet.net
• Subject: [mg104442] Problem with Screen Environment
• From: Helen Read <hpr at together.net>
• Date: Sun, 1 Nov 2009 03:56:05 -0500 (EST)
• Reply-to: HPR <read at math.uvm.edu>

I have a user in my department who has had a bizarre problem with 
Mathematica over the last few weeks (running 7.0.1 on Windows XP). He 
will have Mathematica open and all is well, then leave to go to class or 
whatever. Sometimes when he returns, Input cells are missing from the 
Format->Style menu (other cell types are there). Pre-existing Input 
cells in existing notebooks are not recognized as such (despite 
appearing to be an Input cell if you open with Shift-Ctrl-E) and nothing 
evaluates. It does not seem possible to insert new input cells in either 
existing notebooks or a new notebook. We also discovered that the Screen 
Environment is set to Slideshow when this problem happens, and all of 
the other options (Working, etc.) are missing from the Format->Screen 
Environment menu.

We have tried replacing the init.m files, etc., which did not help any. 
Uninstalling and reinstalling Mathematica fixes the problem, but only 
temporarily. We have uninstalled and resinstalled several times, but the 
problem continues to recur. Today we uninstalled (again), and then 
deleted all of the Mathematica folders (from the user's profile, the All 
Users profile, and from Program Files), rebooted for good measure, then 
reinstalled Mathematica, and *still* the problem returned.

We don't know of anything that would be peculiar to this particular user 
that would be causing this.

We have contacted Wolfram Tech Support (and await a reply), but 
meanwhile, has anyone else seen this or have any idea what might be 
causing it?

-- 
Helen Read
Department of Mathematics & Statistics
University of Vermont