XenCenter blank concole screens, and stats not updating

For me this problem was related to some cache files.

I just saw the suggestion in this thread about clearing the cache....and it worked!

http://forums.citrix.com/thread.jspa?threadID=154046&tstart=0


in short:

Stop XenCenter

run %AppData%\Citrix

delete everything there.

Start XenCenter
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I also couldn't install updates until I cleared the cache...