AutoCAD: Sheet Set Manager displays a lock by the DST name

August 29, 2025 Jeff Arbogast

Issue:
AutoCAD: Sheet Set Manager displays a lock by the DST name.


Causes:
Latency 

Solution:
This can happen even after deleting the .DBL lock file.
This has to do with Latency (VPN, Cloud Servers, Syncing Software). Try adjusting this time to clean this lock up. This can simply be AutoCAD is not seeing the file is unlocked. Try adjusting the SSMPOLLTIME system variable.

  1. While in AutoCAD.
  2. Type SSMPOLLTIME and select the <Enter> key.
  3. Type value between 20 – 600 and select <Enter> key.
  4. This will slow down or speed up how often AutoCAD checks for the current status.

Help file description
SSMPOLLTIME
The SSMPOLLTIME timer sets the time in seconds between automatic refreshes of the status data of sheets in a sheet set. Valid values are 20-600. The SSMSHEETSTATUS system variable must be set to 2  for the timer to operate.
SSMSHEETSTATUS
The status data for sheets in the current sheet set includes whether a sheet is locked and whether a sheet is missing (or found in an unexpected location). This status data can be updated automatically for all sheets.
0   Do not automatically refresh the status data in a sheet set.
1   Refresh the status data when the sheet set is loaded or updated.
2   Refresh the status data when the sheet set is loaded or updated, or at a time interval set by SSMPOLLTIME.

About the Author

Jeff Arbogast

Manufacturing Solution Center Team Lead<br><br>Jeff is responsible for manufacturing Technical Support for both internal staff and customers. In addition to the daily activities of the support center, he helps write for the National Support Center blog, and has written online classes for the IMAGINiT training on demand site.

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