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how to kill a process from Matlab

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Hello,
I need to unload Ansys's HFSS from memory from Matlab.
I am able to close the project file using
invoke(oDesktop,'Closeproject',project_full_pathname');
to close the application (HFSS) I am trying
status=dos('taskill /F IM ansysedt.exe');
I am using Ansys HFSS 2021R2 and Matlab
the command is simply ignored. No error but also no execution
Any ideas?
Thanks
  4 Comments
Sander
Sander on 15 Oct 2021
For this specific HFSS case, an easier solution than the current accepted answer might be to use the QuitApplication function in the oDesktop object.
invoke(oDesktop,'QuitApplication');

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Accepted Answer

Bruno Luong
Bruno Luong on 11 Oct 2021
Edited: Bruno Luong on 12 Oct 2021
I don't know if it is matter but I always use PID to kill a process, not directly the image name. Here is my code
function KillSrvProcess(PrgName)
% KillSrvProcess(PrgName)
% Kill a process of program PrgName
% INPUT:
% PrgName is a char array, the name of the program to be killed
if nargin < 1
PrgName = 'LSAlgoSrv';
end
if ~contains(PrgName, '.exe','IgnoreCase', true)
PrgName = sprintf('%s.exe', PrgName);
end
Mypid = GetCurrentProcessId();
fprintf('Current pid == %d\n', Mypid);
ntries = 30;
for n = 1:ntries
cmd = sprintf('TaskList -fi "ImageName eq %s"', PrgName);
[status, out] = system(cmd);
if status > 0
warndlg('Need administrator privilege?', 'KillSrvProcess');
return
end
lines = strsplit(out,newline());
idxc = regexp(lines, ['^' PrgName], 'start', 'once');
keep = ~cellfun('isempty', idxc);
lines = lines(keep);
pidstr = regexp(lines, sprintf('%s\\s+([0-9]+)', PrgName), 'tokens', 'once');
pid = cellfun(@str2double, pidstr);
% Remove the Current Process ID
pid(pid == Mypid) = [];
if isempty(pid)
break
end
for k = 1:length(pid)
% 'cmd /C ...' To set credentials for taskkill to require admin privileges
cmd = sprintf('cmd /C taskkill /f /pid %d', pid(k));
status = system(cmd);
if status > 0
warndlg('Need administrator privilege?', 'KillSrvProcess');
return
end
end
pause(1);
end
end % KillSrvProcess
You migh comment the lines GetCurrentProcessId() and call
KillSrvProcess('ansysedt')
This is the GetCurrentProcessId() mex file
// mex -O GetCurrentProcessId.c
#include <string.h>
#include "mex.h"
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
plhs[0] = mxCreateDoubleScalar(GetCurrentProcessId());
}
  2 Comments
Image Analyst
Image Analyst on 11 Oct 2021
@NAFTALI HERSCOVICI, so I assume you've tried it by now, so did it work?

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More Answers (4)

Image Analyst
Image Analyst on 10 Oct 2021
I'm not sure there is a taskill (with a single "k"). You should try taskkill instead. Here's an example to forcibly shut down Excel
system('taskkill /F /IM EXCEL.EXE');
  2 Comments
Image Analyst
Image Analyst on 10 Oct 2021
What processes do you see if you type Control-shift-Esc?
Attach a screenshot of the window showing as many processes as will fit.

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NAFTALI HERSCOVICI
NAFTALI HERSCOVICI on 10 Oct 2021
ansysedt.exe
  1 Comment
Image Analyst
Image Analyst on 10 Oct 2021
What is that? Do you care to explain at all?
You said you tried
system('taskkill /F /IM ansysedt.EXE'); % With 2 "k"s this time.
and it didn't work

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NAFTALI HERSCOVICI
NAFTALI HERSCOVICI on 10 Oct 2021
  23 Comments
Image Analyst
Image Analyst on 11 Oct 2021
Yeah, you'd think. So I'm not 100% trusting she's doing it the right way. @NAFTALI HERSCOVICI, can you run Windows's PSR (type it in after you hit the start button) and record your screenshots as you try to kill this process from MATLAB? Then save the recording (it will go into a zip file) and attach the zip file here with the paperclip icon so we can see exactly what you're doing?

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kunal gokhe
kunal gokhe on 15 Oct 2021
Use Ctrl+C to kill Porcess.
  2 Comments
NAFTALI HERSCOVICI
NAFTALI HERSCOVICI on 15 Oct 2021
I need to kill HFFSS from Matlab. I don't think this would do it. Definitely not interested killing the script. it's in a loop that must continue

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