MATLAB: Do I receive License Manager Error -84

MATLAB

License Manager Error -84
USER_BASED license has no specified users — see server log
I also receive this error after starting MATLAB, when I try to use a function from a specific toolbox.

Best Answer

License Manager Error -84 is usually the result of a missing or invalid options file, which is required for Network Named User license.
Make sure you have an options file, by default the options file is called MLM.opt, and that the path to the options file is included in the DAEMON line of your license.dat.
The license.dat file on the server machine is located in:
$MATLABROOT/etc ($MATLAB\flexlm for releases prior to R2010b on Windows)
(where $MATLAB is the MATLAB installation directory)
The following are examples of the DAEMON line for a license that requires an options file:
Windows:
DAEMON MLM "C:\Program Files\MATLAB\R2010b\etc\win32\mlm.exe" options="C:\Program Files\MATLAB\R2010b\etc\win32\MLM.opt"
UNIX/Linux/Mac:
DAEMON MLM /usr/matlab7/etc/MLM options=/usr/matlab71/etc/MLM.opt
(NOTE: prior to R2011a, the DAEMON line on Linux/Mac was "DAEMON MLM /usr/matlab7/etc/lm_matlab")
If you are performing a Network Named User (NNU) installation and you are missing an options file or if you would like information on how to create an options file for Windows or UNIX/Linux Network Named User, please see the link below: How do I create an Options file?
NOTE: Once you have made changes to your license file or MLM.opt, be sure to restart the network license manager for these changes to take effect. For more information on how to restart the license manager, see the Related Solution linked below.
How do I start or stop the Network License Manager?
https://www.mathworks.com/matlabcentral/answers/102968