Detailed Description and Symptoms
When opening an object, the error message below pops up:
U4006501 Object '&01' is being edited by user '&02' since '&03'.
Do you want to open it for read only?
This means that the object is locked by another user.
In order to unlock the object, right-click the object, and choose Properties.
Then click on the "Reset" button under the "Open" section.