execute system commands in matlab

2021 5 6
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更新时间：2021 5 6
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Hi
I can not figure out how to write the correct input for matlab system (or dos, I have tried both) commands.
That I want to do is to call the program HFSS with certain flags. I have verified that it works correctly in a CMD prompt. Here I use the line:
"C:\Program Files\HFSS11\HFSS11\hfss.exe" -runscriptandexit "D:\HFSS Projects\read_variable_from_file.vbs”
I can not make it work in matlab, I would appreciate if someone could help me.
My thanks in advance!
BR
Thomas

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Walter Roberson
Walter Roberson 2021-5-6
What happens if you use
cmd = '"C:\Program Files\HFSS11\HFSS11\hfss.exe" -runscriptandexit "D:\HFSS Projects\read_variable_from_file.vbs"';
[status, msg] = system(cmd)
Thomas Schäfer
Thomas Schäfer 2021-5-6
I get a -1 status return and HFF program does not start. I tried this before...
Walter Roberson
Walter Roberson 2021-5-6
I am having difficulty finding a copy of the documentation for HFSS11 that is not on a crack site, as the software is from February 2009.
Try
2>&1
cmd = '"C:\Program Files\HFSS11\HFSS11\hfss.exe" -runscriptandexit "D:\HFSS Projects\read_variable_from_file.vbs" 2>&1';
[status, msg] = system(cmd)
and show the msg that results.
Thomas Schäfer
Thomas Schäfer 2021-5-6
Hi
Thanks for puting time into this! I attached the HFSS help documentation for this.
I run the system comand with your input, msg is still empty (0×0 empty char array)
Walter Roberson
Walter Roberson 2021-5-6
[status, msg] = system('"C:\Program Files\HFSS11\HFSS11\hfss.exe" -HELP')
and see if you get anything back. That is, we need to start by verifying that we are able to communicate with the program.
Also,
exename = "C:\Program Files\HFSS11\HFSS11\hfss.exe";
if exist(exename, 'file')
fprintf('okay, executable exists, "%s"\n', exename);
else
fprintf('executable does not seem to exist, "%s"\n', exename);
end
Thomas Schäfer
Thomas Schäfer 2021-5-6
编辑：Thomas Schäfer 2021-5-6
[status, msg] = system('"C:\Program Files\HFSS11\HFSS11\hfss.exe" -HELP')
status = -1; msg = 0×0 empty char array
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
exename = "C:\Program Files\HFSS11\HFSS11\hfss.exe";
if exist(exename, 'file')
fprintf('okay, executable exists, "%s"\n', exename);
else
fprintf('executable does not seem to exist, "%s"\n', exename);
end
okay, executable exists, "C:\Program Files\HFSS11\HFSS11\hfss.exe"
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
As I said, then I run the comand in CMD pormt it works...
Also in matlab, just: system("C:\Program Files\HFSS11\HFSS11\hfss.exe") opens the HFSS.
Walter Roberson
Walter Roberson 2021-5-6
I would tend to suspect DLL seach problems; https://docs.microsoft.com/en-us/windows/win32/dlls/dynamic-link-library-search-order . For example that document hints that if there is a DLL loaded by MATLAB, then possibly hfss would attempt to use the already loaded DLL instead of doing any kind of searching for it. That could be a problem if the two DLLs have the same name but are different DLLs or different versions of the same basic DLL.
Thomas Schäfer
Thomas Schäfer 2021-5-6
Okay.
I manage to solve this by running:
system('set path=%path:C:\Program Files\MATLAB\R2018b\bin\win64;=% & "C:\Program Files\HFSS11\HFSS11\hfss.exe" -runscriptandexit "D:\HFSS Projects\read_variable_from_file.vbs"');
I find the selution by reading https://se.mathworks.com/matlabcentral/answers/408044-what-is-the-difference-between-a-system-call-from-matlab-using-system-and-a-command-in-a-cmd-ter
I should ad that I am using MATLAB2019
Thanks again for you help!

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