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E5505A Phase Noise System

Question asked by Bryan on Dec 6, 2012
Latest reply on Dec 19, 2012 by Bryan
Apologies if I have put this in the wrong forum but this one appeared closest.
I am runing an E5505A system with software rev. A.04.02.
Yesterday I completed several sets of measurements for a reference source characterization using the 3 Oscillator Comparison in the Analyze Menu.
Things were going smoothly, I picked saved source files and made destinations and created several charaterization files.
Now for some reason I can no longer access the 2 or 3 Oscillator Comparisong function, I get a pop up warning of a problem with the GUI and do I want to send off the error info to microsoft.
The Analyze Menu has 4 items, the previously mentioned Source Comparisons, Allan Varaince & Trace Integration.  The latter 2 do not seem to be affected.  
Any ideas what could have gone wrong?  Have rebooted, disconnected from network and no change.  Any ideas?