Model-level locks are employed by operations that require restricted access to the central file. For example, when one user is updating the central model during Synchronize with Central, other users must be kept from reading or writing this model at the same time. When a model-level lock is applied, users will encounter the following dialog when attempting to access the central model:

File:User:drafts/258356/Revit_Server_accessing-file-message.png

This condition generally clears quickly, within a few minutes.

If users report being unable to access a model for a longer period of time, it is possible that a model-level lock has been orphaned. To clear an orphaned lock:

On the Revit Central Server, navigate to the 'Projects' folder and open the central model’s folder. Locate two files named “Data_Users.lock” and “Permissions_Users.lock.”
Copy the two lock files to a temporary area.
Determine which file is non-zero in size and view the copy that you made of that file with a text editor. (Occasionally both may be non-zero in size; in this case, view either file.)
Note the first field, which indicates the user who created the lock. For example, the lock file below indicates that an individual with the Revit username “leemic” created the lock.
If there is more than one entry in the file, identify all users except for the one in the first entry. Have each of these users cancel out of any in-progress operation and then save their changes locally.
Identify the user in the first entry of the file. If that user is continuing to work with the model in question, have them Synchronize with Central and then shut down their Revit session.
Delete both “Data_Users.lock” and “Permissions_Users.lock” from the central model’s model folder.

Revit Server will then release the model-level lock, restoring access to the central model for all users. (The two lock files will be automatically regenerated when needed.)

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pattygaleFri May 6, 2011 11:16 amThis information was contributed by Mike Lee, Autodesk Revit Server QA.
It applies to both Revit 2011 and Revit 2012.
Thanks, Mike!
-- Patty Gale, Autodesk Revit User Experience Team
robert.mannaMon May 9, 2011 7:37 pmIf the identified user is not actively working in the project then they may need to re-open their most recent local file or create a new local file. If they crashed then they should open their recovery file or create a new local file. Lastly if the user was not recently working in the particular model at all, then the lock may have been generated because the model is linked into another, in which case a local file would need to be created in their username and SWC operation run. The SWC dialog in all cases may indicate that no elements or worksets are checked out or borrowed, however the SWC will still clear the lock.
hermeytheelfTue May 10, 2011 2:17 pmWhat the what? On the last item '... if the user was not recently working in the particular model at all, then the lock may have been generated because the model is linked into another...'
Robert, are you saying that a model can become locked by an event that occurs in another model that it is linked into? We have run into some weird stuff but not this one!
nbowerMon May 23, 2011 11:21 amhermeytheelf, we tend to see this if something happens while loading the model. Essentially, when a model with active loaded links opens it will temporarily lock the linked file during opening. Typically if the model opens correctly everything is good and the lock goes away. However, if the model heppens to crash or get hung, up the linked model it was trying to load will become locked. Easy fix as the user who had the error can just reopen the local file again and it will clear.
robert.mannaTue Aug 9, 2011 6:31 amMost of the above article is uncessary and superseeded by the changes to Revit Server 2012 with Service Pack 1. In Revit Server Admin you will now get a visual warning when a non-administrative lock is in place for an extended period of time. The visual warning also includes the username, making it easy to then have the user Sync the file to clear locks or aid in troubleshooting.
biagiThu Jun 28, 2012 5:55 amI installed the Service Pack 1 and the Hotfix, the weird thins is that two permission files “Data_Users.lock” and “Permissions_Users.lock.” are blank, Size is 0KB, But the models are locked by another user, and some times the user who is locking the model never had anything to do whith this model.
karen.smithMon Jul 9, 2012 6:41 amHi biagi - It’s likely that you're seeing a locked model condition because a linked model is locked, not the model being directly edited. There are several operations that require model level locks on links (e.g., opening a local copy of the host model, or doing anything with shared coordinates,) and depending on network conditions these may occasionally be visible to users. If you have the service pack for 2012 installed on all servers, you should be able to see which models have “stuck” model level locks (i.e., locks that are more than a few minutes old) in Revit Server Administrator. Hope this helps! - Karen Smith, Autodesk Revit User Assistance team

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File			Size	Date	Attached by
		Revit_Server_accessing-file-message.png Revit Server Accessing File Message	3.93 kB	09:41, 11 May 2011	ccielo	Actions Attach new version Edit description Move/rename Delete
		Revit_Server_data_userslock.png Revit Server Data Users Lock	6.02 kB	09:41, 11 May 2011	ccielo	Actions Attach new version Edit description Move/rename Delete

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Troubleshooting Model-Level Locks in Revit Server

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