When you undo a check out, the lock and the revision number that was created during check out is released. No changes are checked into the Dimensions CM repository.
To undo a check out:
Right-click the checked out files and select Team | Undo Checkout.
The Undo Checkout dialog box appears with a list of selected files.
On the Checkout panel, do any of the following:
Select or deselect which files to act on.
Select from available options on the Options tab. For example, change the value to Replace with Latest Revision for Local contents to overwrite the file in the local workspace with the latest revision in the Dimensions CM repository.
Click Finish.