My command runs with the cmd but not with the dos matlab function. Why ?

I want to launch an ANSYS simulation from Matlab by using the "dos" function. It asks to execute the following dos command:

 "C:\Program Files\ANSYS Inc\v150\ANSYS\bin\winx64\ansys150.exe"  -p aa_t_a -dir "E:\MEF_pre" -j "Simu" -s read -l en-us -b -i "E:\MEF_pre\Conditions_limites_volume_AllAtOnce.f" -o "E:\MEF_pre\file.out"'

When I enter the command line in the cmd, everything work perfectly. But when I execute the command from Matlab with "dos" or "!" the simulation stops at the first iteration with a simple error window ("Mechanical APDL Program stopped working") without any diagnosis. Why do I have two different results with apparently the same entry?

I use Matlab R2014b, ANSYS v15.0.7 and windows 7 64 bits. I use the dos function as follow:

>> dos('"C:\Program Files\ANSYS Inc\v150\ANSYS\bin\winx64\ansys150.exe"  -p aa_t_a -dir "E:\MEF_pre" -j "Simu" -s read -l en-us -b -i "E:\MEF_pre\Conditions_limites_volume_AllAtOnce.f" -o "E:\MEF_pre\file.out"');

[Mustafa Al-Bazoon]

Hey did you get the problem solved? I succeeded passing the info from Matlab to ANSYS. However, there are no output files. It just solves the problem without results.

[Varun Goyal]

Hey! My data is not passing to the ANSYS either. Can you help me resolve the same? I am trying to run ANSYS through MATLAB with an input file to be input in command prompt of ANSYS. But it says Mechanical APDL has stopped working.

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/225215-i-get-message-ansys-program-has-stopped-working-when-i-try-to-run-ansys-by-matlab

[Robi]

I found the answer to my question thanks to your link. Thank you very much !

Answer 2

[Image Analyst]

Without trying it, my guess is that it's getting confused over all the single and double quotes. My recommendation is to create your command line string with sprintf() first, then pass that into dos() and see if it works

commandLine = sprintf(.............)  % Create command line string.
fprintf('CommandLine = %s\n', commandLine); % Print it to MATLAB's command window.
dos(commandLine) % Execute it

For the paths that don't have any spaces in them, you might try just putting them down without wrapping them in double quotes. Paths with spaces in them (like Program Files) will still need to be wrapped in double quotes.

[Walter Roberson]

The quoting looks fine to me.