Autodesk Network License Manager Troubleshooting

Here is a quick troubleshooting list when you can’t seem to retreive a network license for your Autodesk product using FlexLM.

  1. Make sure your license manager (LM) server is running.
    • Check to make sure the machine is on.
    • Check to make sure the network cable is plugged in.
    • Check to make sure the service is running.
    • Re-read the license if necessary.
    • Confirm the NAME of the LM (to be used later).
    • Open Internet Explorer (Do not use Chrome, Firefox, Opera, etc).
      • In the address bar, enter the hostname of your license manager, prefixed with http:// and the port numbers 2080 and 27000 on the end  (for example: http://myserver:2080 and http://myserver:27000 )
      • You should get a response in Internet Explorer that looks like the image on the left here: IE ResponseIf you do not get a response like this, it will say something like “Host cannot be reached” – in this case, your LM is not running. More details on this step.




  • Make sure that your PC can access the LM.
  • Make sure you can ping the LM. Go to Start>Run, type in CMD. At the Command Prompt, type in PING MYLM (where MYLM is the name of your LM). You are looking for a response like this:
    Reply from bytes=32 time<1ms TTL=128
    Reply from bytes=32 time<1ms TTL=128
    Reply from bytes=32 time<1ms TTL=128
    Reply from bytes=32 time<1ms TTL=128
  • If you get a response of Ping request could not find host… or Request timed out, then you may have connectivity problems not related the AutoCAD or the LM.
  • Next, open the Control Panel, then choose System. (You can quickly do this by pressing the Win key and the Pause/Break key). Then choose the Advanced tab, and then click on the Environment Variables button.
    • In the System Variables box, check to see if there is a variable named ADSKFLEX_LICENSE_FILE.
      Windows Environment Variable ADSKFLEX_LICENSE_FILE
    • If there is, make sure the value is set to the name of your LM. It should begin with an “@” sign. Example: @MYLM.
    • If you have more than one LM, separate the names with semicolons. Example: @MYLM;@MYLM2;@MYLM3
    • If this variable does not exist, create it using the NEW button and add the fields as mentioned above.

If you add this environment variable correctly, then there is no need to ever worry about a LICPATH.LIC file or any other method because the order of precedence always starts with the ADSKFLEX_LICENSE_FILE environment variable.

If you done all the above and are still getting an error message, take a look at this list of FlexLM error codes and their meanings.

See also:  Use of LICPATH.LIC file and ADSKFLEX_LICENSE_FILE environment variable on same computer | FLEXlm License Finder dialog box displayed at startup

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