https://knowledge.autodesk.com/support/moldflow-adviser/troubleshooting/caas/sfdcarticles/sfdcarticl...
The error mentioned in the link above causes a lot of confusion for the users I support at my global enterprise company. I want Moldflow (and all other Autodesk apps) to report the exact problem instead of 3 potential problems. The user wants to presume that the app is installed wrong. Most of the time "all licenses are currently in use" but it's very difficult to know that for sure because license usage can change any second and I don't have access to the license server.
I would hope that the FLEX License Manager return code (-4, -5 -26, etc) would be enough info to report the actual problem.
http://www.opendtect.org/lic/doc/endusermanual/chap13.htm