When a network licensing error occurs, you may see a dialog box that provides a description of the error and a numeric error code. For example:
The following is a list of the four most common network licensing errors with the most common methods for resolving them:
-5 No such feature exists.
This error indicates that the Autodesk Network License Manager was contacted by the application successfully, but that it does not contain an “Increment” for this product. Review the license file and the setup of LMTOOLS on your server.
-15 Cannot connect to license server system. The server (lmgrd) has not been started yet, or the wrong port@host or license file is being used, or the TCP/IP port or host name in the license file has been changed.
This error most commonly occurs if a firewall on the client or server will not allow the product to communicate with the License Manager. Turn off any firewalls to test whether this is the case.
-18 License server system does not support this feature.
This error most commonly occurs if you have more than one increment in the license file on the server. License files can have only one increment per product. This error can also occur if you are using a “series” or “suite” product that is attempting to cascade to a different increment. You should ensure that you have a current PLIST increment and that you also have the “series” or “suite” increment for your product in the license file on the server.
-96 License server machine is down or not responding. See the system administrator about starting the server, or make sure that you're referring to the right host (see LM_LICENSE_FILE environment variable).
This error most commonly occurs if the Autodesk Network License Manager is no longer running on the server. Check LMTOOLS on the server to verify that this service is starting correctly.
For a complete description of all error codes, refer to the FLEXlm® documentation (in HTML format), which is included with the installation of the Autodesk Network License Manager. By default, the FLEXlm documentation is located at C:\Program Files\Autodesk Network License Manager\Docs\FlexUser
If the Autodesk product does not display an error code, or you want a more descriptive response, follow the instructions in the following article to increase the amount of information returned when a network licensing error occurs:
Increasing verbosity of FLEXlm errors