Any Version Documents in a Project must be locked before the Master Document can be edited in one2edit™. This is to ensure that changes made in the Master Document do not clash with changes made directly in the Version Document.
Therefore, if a Version Document cannot be locked, it is probably already open by another user.
Click Padlock
After opening the Master Document in the editor, click the Padlock button in the upper-right corner to lock all Version Documents.
Lock Versions Dialog
Clicking the padlock button opens the Lock Versions dialog.
An X next to a version document indicates that it is currently open by another user and cannot be locked at this time.
Clicking Lock while a Version Document is open will display error 13148.
Click Cancel to close the Lock Versions dialog instead.
Optional: Check which User has the Document open
If a document is open, the Status column for that document will contain a pencil icon.
Double-click on the document to open its Workflow.
Click the Edit button in the top-right of any Workflow track. This will attempt to open the Job as an Administrator (i.e. in Admin Mode).
If the document is already open by a user, an error message will pop up, which contains the name of the user.