After i developed a custom project server workflow using vs 2010, i tried to deploy it using this article
http://msdn.microsoft.com/en-us/library/ff459292.aspx and everything done great (Add, Install and Activiate) .. when i tried to debug from VS 2010 i got this error while deploying
Error 6 Error occurred in deployment step 'Activate Features': Feature with Id 'c34364d9-0323-4e46-98c1-d74f638e6c7d' is not installed in this farm, and cannot be added to this scope.
0 0 WorkflowProject1
i'm pretty sure that the Guids are the same ... and i got the same error when i tried to activate the feature from VS 2010 directly
here is my feature xml (inside VS 2010)