You may receive the following message when performing version control commands:
Version Control Error. Working Copy <your working folder path> locked
This can be caused when a previous version control operation is interrupted (e.g., you lost your network connection or your computer froze up or lost power while doing a Check In or Undo Checkout). To resolve this, right click on the top-level package and select Clean Up Working Folder.
A confirmation dialog will be presented. Click Yes.