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Q100417: "License Error: 'Device' is currently using this license." error message with floating RLM Modo licenses


When running Modo off a recently issued floating RLM license, users may only able to run Modo on one machine at a time.  When Modo is launched on a second machine it will pop up the following error message: "License Error: "Device" is currently using this license. Would you like to enter slave mode?"

Image 1: The "License in Use" error message in Modo

This prevents users from running Modo on a second machine regardless of the number of floating Modo licenses installed on the license server.



This was due to a bug Modo interpreting the options string in the RLM license file as a serial number from the old Luxology licensing system and thereby preventing a second user from running off the same "serial".

This bug was fixed in Modo 12.2v2.



This bug has been fixed in Modo 12.2v2.  Updating to Modo 12.2v2 or later should resolve the problem.  You can download the latest versions of Modo from


If you're unable to update the version of Modo you are running then the issue can be resolved by having your licenses regenerated without an options string.  To request this, please raise a Support Ticket from the Support Portal and send us the following information:

  • A screenshot of the error message from Modo
  • A license diagnostic file from the Foundry License Utility (FLU) on your license server.  Instructions on how to generate this can be found Q100105: Diagnosing License Problems

Once we confirm this is the problem we will get your licenses regenerated and sent through.

More information on how to create a Support Ticket is available in: Q100064: How to raise a support ticket

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