Network licensing error [1.5.-15] when starting the software

When you tried to launch your AutoCAD®-based software, the following error message was displayed:

The network license manager was not able to get a valid license. If this problem continues, please contact your system administrator. Error [1.5.-15]

This error indicates that the software was unable to find a valid license manager. Common causes of this error message are listed below.

• The Autodesk Network License Manager (FlexLM) may not be operational. You should make sure that the license is properly configured and running. Check LMTOOLS > Server Status tab > Perform Status Enquiry. If the license manager is running correctly, this report will list the licenses that are available and the licenses that are in use for each product. If it does not, you should refer to the following solution to make sure that the license manager is configured correctly: Problems configuring the Autodesk Network License Manager (FlexLM).
• Make sure that you can ping both from the license manager to the client and from the client to the license manager by hostname. If you are unable to ping by hostname, it indicates a networking problem or an issue with name resolution. Contact your network administrator or IT professional for assistance correcting these problems.
• Firewalls and other port filtering software and hardware can block the required license manager traffic. Make sure that port 2080 and the port range 27000-27009 are not being filtered or blocked by any firewalls or network devices. It is strongly recommended that the Windows Firewall be disabled on both the client and license manager machines.
• If the license manager is operational, the client machine may not be looking for the correct license manager. Set an environment variable on the client machine to point to the correct license manager. For additional information about setting this environment variable, refer to the following solution: Specifying license servers using the ADSKFLEX_LICENSE_FILE environment variable.

See also

Single server network license manager quick start guide
Determine if Autodesk® License Manager (AdLM) has started
Using the licpath.lic file for Autodesk® network license enabled products
How to combine Autodesk products with non-Autodesk products already using FLEXnet