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Error: No PLTS licenses are available

Error Message

When starting a second instance of ArcMap on the same computer the following error may occur:

"No PLTS licenses are available"

Cause

Communication between the license server and ArcGIS has been interrupted or blocked.

Solution or Workaround

Switching the license manager to a static port and then ensuring that these ports are open may alleviate the communication problem.

  • Follow the steps in the article linked in the Related Information section to set the ArcGIS license manager to a static port.

Related Information