15 Cannot connect to license server system. Workaround: Use IP address (e.g., 123.456.789.123) instead of host name. This often happens when NIS or DNS or the hosts file is incorrect. The lookup for the host name on the SERVER line in the license file failed. 14 Cannot find SERVER host name in network database. 12 Invalid returned data from license server system. The hostid of this system does not match the hostid specified in the license file. This usually happens when a license file has been altered. The license key/signature and data for the feature do not match.
8 Invalid (inconsistent) license key or signature. 7 No socket connection to license server manager service.
6 No TCP/IP port number in license file and FLEXnet Licensing service does not exist.
4 Licensed number of users already reached. 3 No license server system for this feature. The 'Z' error codes for FlexLM are as follows: The license subsystem in Autodesk products reports possible errors in the form of, where 'X' is the kind of a problem, 'Y' is 1 (standalone license) or 5 ( FlexLM license) and 'Z' is the specific error (usually a negative number).