Why does MATLAB take a long time to start?

441 views (last 30 days)
I notice that MATLAB takes a long time to start. Other times it fires up right away. Any ideas on how to fix this?
  1 Comment
Giancarlo Storti Gajani
Giancarlo Storti Gajani on 4 Feb 2021
Using Matlab 2020b on linux.
If I start matlab in the usual way it takes 10 minutes or more, but I've noticed a "strange" behaviour: if I start matlab as
matlab -nodesktop
it starts in about 5 seconds, if I then enter
>> desktop
at the matlab console prompt, the desktop is up and running in less than 10 seconds. If I then try starting Simulink it takes at least 5 more minutes.

Sign in to comment.

Accepted Answer

Ian Jessen
Ian Jessen on 6 Jan 2011
A slow startup is often caused by issues with the license search path. You probably need to adjust one of the license environment variables (LM_LICENSE_FILE or MLM_LICENSE_FILE) used by MATLAB, or else bypass them all together.
There are also some instances in which your MATLAB preferences or Anti-Virus program may negatively impact startup times.
For detailed info on applying these workarounds, visit the following Technical Support solution:
http://www.mathworks.com/support/solutions/en/data/1-2Z18MA/

More Answers (1)

Dan Cogan
Dan Cogan on 2 May 2018
Edited: Walter Roberson on 2 May 2018
Double check with -c that the issue has to do with licencing (e.g. <path-to-matlab>/matlab.exe -c <path-to-license-file>). If it opens quickly then Matlab is having some difficulty with LM_LICENSE_FILE.
Some have recommended removing LM_LICENSE_FILE (and using MLM_LICENSE_FILE) but I couldn't because of other software. However, one of those software tools had their own unique license variable as well, so I moved the pertinent license info to that one. Now Matlab loads quickly.
I suspect that because the other tool licences in LM_LICENSE_FILE were accessed over a network, and there were several network servers, this throws Matlab off somehow. Seems like a good solution is to minimize what goes into the shared LM_LICENSE_FILE variable.
  1 Comment
Joshua Lawton
Joshua Lawton on 20 Jan 2021
I made a batch file using your suggestion and am very happy with the new start-up time of ~15 seconds compared to ~10 minutes without. -- Thanks Dan!!!

Sign in to comment.

Categories

Find more on Startup and Shutdown in Help Center and File Exchange

Tags

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!