Yesterday it happended a lot that my Design Studio would not start, the error log showed:
!MESSAGE Problems occurred when invoking code from plug-in: “org.eclipse.e4.ui.workbench”.
Even the logon screen for BO server did not come up. Solution to this is:
Delete all files and folders in location: C:\Users\..\Analysis-workspace\.metadata\.plugins
(some 2 com.sap and 6 org.eclipse folders)
You have lost your user preferences in DS (eg. so start up mode, which windows to see), but DS starts up fine again.
log location: C:\Users\..\Analysis-workspace\.metadata