While editing the path to the vendor daemon in the DAEMON line, it's common to clip the first character of the first INCREMENT line. This will cause an error like this in the license server debug log file:
18:44:34 (lmgrd) The license server manager has found no vendor daemons to start
18:44:34 (lmgrd) (There are no VENDOR (or DAEMON) lines in the license file),
(Invalid license file syntax.
License text: mgcld
License path: C:\license_files\license.dat
FLEXnet Licensing error:-2,399
For further information, refer to the FLEXnet Licensing End User Guide,
available at "www.macrovision.com".)
Go to the license file and ensure that the first INCREMENT line isn't missing the "I". One typo on this first line causes the parsing of the entire license file to fail.