License Manager Stops Working Unexpectedly

If your license manger software (lmadmin) stops working unexpectedly and you need to manually re-start the service to get it working, there are a number of things you can check:

  • Ensure you are running the latest version of lmadmin.
  • Check the firewall to see if the inbound and outbound ports are blocked.
  • Check if there is a conflict on the License Server port with any other application.
  • There is a security feature in Windows called Data Execution Prevention.  In some cases, this feature may prevent the License Server from starting. If that is the case, the log file may show an error like:
    • "TCP_NODELAY NOT enabled.
    • Lost communications with lmgrd.
    • Socket disconnected by remote.
    • Exiting DUE TO SIGNAL 28 Exit reason 5.".  
  • To avoid this error, do the following:
    • Stop the license service using LMTOOLS or in Windows Services.
    • Stop any process in Task Manager named lmadmin.exe.
    • Go to DEP exception list under System Properties | Advanced | Performance | Data Execution Prevention.
    • Add an exception for lmadmin.exe where the License Manager is installed.
    • Restart the service.
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  • 29-Mar-2019
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