matlab takes FOREVER to start when the pc is not connected to the internet

I have 2015b and 2016a on a stand-alone PC with no internet connection. Starting either installation takes AGES the first time each day and sometimes I get an "error" saying Matlab can't contact mathworks. Presumably it's trying and failing to get a connection and waiting until it does so.

RE-starts then only take 15s.

There is NO reason for matlab to talk to the mothership. How can I stop it trying?

Answer 1

[Andreas Goser]

Can you try starting MATLAB with the "-c" startup option? This avoids MATLAB looks for license files in unexpected places.

[Andreas Goser]

http://de.mathworks.com/help/matlab/ref/startup.html

http://de.mathworks.com/help/matlab/matlab_env/commonly-used-startup-options.html

[Nick]

I tried modifying the windows desktop shortcut to

"...\matlab.exe" -c

Makes no difference. Sometimes starts after 11s sometimes hangs on the startup splash for 2 minutes.

Do I need to specify the location of the license file after the "-c"; if so, where is it? Any ideas?

[Andreas Goser]

Depends somewhat on release and OS, but current Windows releases have a "licenses" folder where the license files are. Mostly just one.

I suggested -c as I know there is impact in case of other tools using FLEXnet. Do you have an environment variable like LM_LICENSE_FILE?