Failure to check out a license when running a network product on the same machine as the network license server


You configured a machine to be a network license server and then installed an Autodesk product on the same machine.  When you launch the product, it tries to check out a network license and fails. 

On Windows, the FLEXnet Finder dialog displays and, when dismissed, is followed by a license error dialog displaying the error code [-15.570.36]. In the Mac OS, a license error dialog displays the same error code but it does not display a FLEXnet Finder dialog.

This happens on all operating systems where an IPv6 stack is installed.




The following steps should allow the client to find the server and check out a license file:


  1. Get the IP address of the machine (by typing “ipconfig” command in a CMD window or by getting it from the LMTOOLS “System setting” tab).
  2. Open the hosts file located in C:\Windows\System32\drivers\etc.
  3. Add the IP address and hostname to the hosts file, e.g., “111.222.333.444  machine_name”.
  4. Save and close the hosts file.


  1. Get the IP address of the machine by typing “ifconfig” in a Terminal window.
  2. In the Finder, click the “Go” menu; pick ”Go to Folder…”; type “/etc” in the edit field and press “Go”.
  3. Locate and open the hosts file for editing.
  4. Add the IP address and hostname to the hosts file, e.g., “111.222.333.444  machine_name.local”.
  5. Save and close the hosts file.



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