Last week I gave a presentation internally at our Info Support Knowledge Transfer evenings. Based on a deep dive training I got to attend on Campus begin of May, I presented a session on Windows Workflow 4.0. As you might know I am passionate about two technologies that I try to dig into as deep a s possible and those are visual Studio Team System and Windows Workflow Foundation. During the preparation of my talk on workflow, I obviously wanted to show some workflow designs and create some designs on the fly.

But Every time I wanted to create a new Workflow, the designer crashed and Visual Studio got closed 🙁

It took me some while to discover that the crash was caused by the Visual Basic expression editor that gets activated once you create a workflow. This editor was unable to load a required assembly. It appears that this was caused by the fact that I installed Visual Studio at a different location then the default c:\ drive.

In the Beta the bits don’t check the install directory location in the registry but just assume this to be the default location.

But how could I fix this? I did install on D:\ and was not willing to install again, since that would take a lot of time.

After some digging around I found a great solution that is posted at the connect site. You can create a symbolic link at the OS level on the file system.
When you make a c:\profgram Files\Visual Studio 10.0 directory point to the actual installation on the D:\ drive the issue is solved.

You can use the mklink command for that and specify the /J option to create a directory junction. After running mklink as an administrator and restarting Visual Studio , I was able to create workflows.

Hope this helps if you run into the same issue.

Cheers
Marcel