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"


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