The issue I described here : http://pytools.codeplex.com/discussions/363287 still occurs from time to time in Visual Studio 2010, even though I have bumped up the value of HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\10.0\PythonTools\Options\Advanced\CrossModuleAnalysisLimit to a very high number.

I can live with this, as it works most of the time.

I have now moved to Visual Studio 2012. On first startup, I see that the issue described above is present immediately. I observe that there is not similar registry key for 12.0.

Is there a solution or workaround for this?

Many thanks.

The option is still there but by default there is no limit. There's a good chance that the analysis has not completed (and may never complete) - CPU usage should give a pretty good idea of whether this is the case.

If you create the value in the VS2012 hive then it should work the same as earlier.

Also make sure you look under the 11.0 key in the registry, VS 2012 is actually version 11 so that's where it's keys live.  It can be a little confusing.