MATLAB Answers

Mutliple Copies of MATLAB on the same machine -- how to set the default

36 views (last 30 days)
Matlab2010
Matlab2010 on 3 Jul 2013
I had 2012A working fine on my machine.
I just installed 2013A.
I have code which automatically launches matlab from task scheduler. All this is is a batch file which contains "start matlab myFunction.m".
Task scheduler is now launching 2013A. I want it to launch 2012A. How do I make it do this? There must be some setting in MATLAB to choose the default version.
Ie I wish to currently have 2012A as the default. At some time in the future I will want 2013A to be the default.
I should also add that simply changing the file association does not work. This does work if you want to manually click on an m file. it does not work if an m file is called from a batch file.
Im running windows 7 pro 64bit

Answers (4)

Guru
Guru on 3 Jul 2013
This is an operating system question/task scheduler question and not a MATLAB question.
That being said, simply choose the proper matlab.exe file to run based on the file location. By default, installing a new MATLAB version should not remove the old MATLAB version. Also by default, all your installations should be within:
C:\Program Files\MATLAB
In this folder, you should have a separate folder for each MATLAB installation
  1 Comment
Guru
Guru on 3 Jul 2013
Have you tried changing the default application for M-files within Windows?
You can locate a M-file, right click it, and choose Open With... Then you can select to browse for the appropriate MATLAB.exe file.
The M-file association is not MATLAB version dependent. How your computer chooses the application to use for any file type/extension is based on the operating system settings. As Andreas mentioned below, there may be some environment variables or registry settings where this is stored as well, but again this is all from the computer operating system side and NOT MATLAB.

Sign in to comment.


Andreas Goser
Andreas Goser on 3 Jul 2013
Edited: Andreas Goser on 5 Jul 2013
Although cumbersome, you can add the full path of matlab.exe to you batchfile
C:\pathname\matlab.exe -r myFunction.m
If I am not mistaken, the also are ways to add environment variables or registry modifications.
  2 Comments
Andreas Goser
Andreas Goser on 5 Jul 2013
The error message or description could help :-) This here works on my machine as an example:
"C:\Program Files\MATLAB\R2013a\bin\matlab.exe" -r "a=1"
Please try it and if it works modify a=1 with your code.

Sign in to comment.


Walter Roberson
Walter Roberson on 3 Jul 2013
Edited: Walter Roberson on 3 Jul 2013
MS Windows uses the registry to decide which MATLAB version to use when asked to open a .m or .fig, or when an application asks to talk via ActiveX to MATLAB.
You can tell MS Windows to use a different version by starting up MATLAB with the -regserver flag.
C:\pathname\matlab.exe -regserver
This only needs to be done once and should hold until you next register a different version (or something corrupts the registry.)
  4 Comments

Sign in to comment.


Ken Atwell
Ken Atwell on 8 Jul 2013
See http://www.mathworks.com/help/matlab/matlab_env/associate-files-with-matlab-on-windows-platforms.html for information on how to change the associate from one version of MATLAB to other.
I know you thought Guru's suggestion was unhelpful, but specifying the full path to the specific version of MATLAB you want strikes me a completely reasonable. In your case, the file you want to run is probably
"C:\Program Files\MATLAB\R2012a\bin\matlab"

Tags

Community Treasure Hunt

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

Start Hunting!

Translated by