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I am getting the same problem as http://forums.arcgis.com/threads/19468-Opening-tools-causes-ArcMap-to-freeze-crash

That is, when I open any geoprocessing tool in ArcCatalog (might happen in ArcMap as well, though it hasn't to me yet), sometimes the application hangs. The timing of the hang occurs after the tool dialog opens but before it finishes drawing. I don't know exactly what conditions cause this to happen, but it feels random, maybe in 1 in 4 attempts it hangs.

For me, terminating the hung process and trying again sometimes works, sometimes it doesn't. But it's a huge headache.

Has anyone come across the same problem and found any resolution? I have already tried reinstalling ArcGIS. I think this started happening some time after installing SP3 for ArcGIS 10.

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When did it start crashing? Any particular software you installed? –  R.K. Feb 5 '12 at 15:24
From memory nothing unusual stands out. I haven't had the problem since I deleted my geoprocessing history from my profile but I hesitate to call that the answer as I'm not 100% certain that's what fixed it. –  blah238 Feb 5 '12 at 22:48
I lied, it's still happening, although it seems to happen more in ArcMap than ArcCatalog. Working with the mosaic dataset tools. –  blah238 Feb 6 '12 at 21:20
Someone I know had a problem with random hangs with geoprocessing tools in ArcGIS 10, a system wipe and reinstall seemed to fix the problem. I'd hate to suggest it as a solution, though, and it doesn't really get to what's causing it. Just a thought I felt was worth sharing. –  Lou May 3 '12 at 20:39
I would recommend contacting ESRI Technical support. It could be a configuration specific issue or even a system specific issue. –  Devdatta Tengshe May 4 '12 at 3:43

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