error Unable to create source control class: %Studio.SourceControl.ISC opening %SYS classes or routines

I am having a problem when using atelier on my instance, which I just synched from perforce on latest and then did a built

I am getting the error
ERROR #5880: Unable to create source control class: %Studio.SourceControl.ISC [zSourceControlCreate+17^%Studio.SourceControl.Interface.1:%SYS]

every time I want to open any class or routine from %SYS namespace in the Server tab.

Did someone had the same issue?

Mario

Answers

This is really an ISC internal issue but I would ensure that %Studio.SourceControl.ISC is compiled on the server. 

I checked and I don't have the class %Studio.SourceControl.ISC

so I am curious why is asking for that class.

That's odd - something may have gone wrong with your build. (This is an internal issue.)

You can remove/change the "Source Control" class for the namespace in Management Portal:

Go to System Administration > Configuration > Additional Settings > Source Control, select the proper namespace, select "None," and click "Save."

Comments

I checked and I don't have the class %Studio.SourceControl.ISC

so I am curious why is asking for that class.