Upon receiving a distress call for AutoCAD 2010 not connecting to the license server on a computer, I investigated the issue only to come up with: Error -5.412.0
Since there were multiple computers all connecting to the same server without a problem, I decided the computer affected had it's own issues as opposed to my fear that the "license server" was having problems. Doing the good ol' Google search on the issue, I came across an Autodesk forum where someone suggested deleting the CASCADEINFO.CAS file from the computer. Not having anything to lose at this point, I decided instead to rename the file and not delete it. Once I re-opened the AutoCAD 2010 software, the computer connected to the server without a problem!
So, all credit goes to the suggesting individual of the problem, but I am attempting to get more exposure to the fix as well as document the fix for future use.
Windows XP Navigate to:
C:\Documents and Settings\All Users\Application Data\Autodesk\Adlm
Windows 7 (Vista?) Navigate to:
Rename or Delete:
Once this file is deleted: Restart AutoCAD 2010
Additional locations where you can find this file (as posted in the comments below) are:
C:\Documents and Settings\All Users\Application Data\Autodesk\AutoCAD 2010\R18.0\Adlm\
Keep in mind this issue really only applies to the -5.412.0 error at this point, unless there are other error codes you know of that will fix this problem.
Also, as of 2010-May-11, there is an update 2 for AutoCAD 2010. I personally have not had a chance to try this update (or looked into the changelog) to see if it fixes this re-occurring problem, but it might be worth a shot. If anyone knows (or has had luck) with the update, please feel free to leave a comment below and let us know :)