Dynamo Error Message - Revit 2015

Hi Guys,

I’m getting this error message when I try to lunch Dyanmo 1.2.0 within Revit 2015, has anyone seen this before ? how can I fix it?

dynamo error

If you go to installed programs, which version of Dynamo core does it show as installed?

This was caused by multiple installations of Dynamo. Installed versions were 0.9, 1.2, 1.3 all on the same machine. Dynamo doesn’t handle that too well and it crapped itself.

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