execution of external program fails

Question

Matthias Pospiech 2012-3-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/31120-execution-of-external-program-fails

I call ghostscript with

cmd = [gs ' -sOutputFile="' outputFile '" -f "' inputFile '"'];
status = system(cmd); % Run Ghostscript.

which results in commands like this one:

gswin32c.exe -q -dSAFER -dNOPAUSE -dBATCH -dEPSCrop -dUseFlateCompression=true -dAutoRotatePages=/None -dHaveTrueTypes -r600 -dGraphicsAlphaBits#4 -dTextAlphaBits#4 -sDEVICE=png16m -sOutputFile="C:\SVN\google code\latexfigure\trunk\example\TEMP9058.png" -f "C:\SVN\google code\latexfigure\trunk\example\TEMP9058.pdf"

This is valid code an works in the command windows of windows. But matlab comlains:

Der Befehl "gswin32c.exe" ist entweder falsch geschrieben oder 
konnte nicht gefunden werden.

The 'gswin32c' is in the path of windows and I restarted matlab already. What could go wrong?

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Answer 1

Daniel Shub 2012-3-4

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https://ww2.mathworks.cn/matlabcentral/answers/31120-execution-of-external-program-fails#answer_39592

There is something wrong with the path when you run system. MATLAB doesn't use the same path as the Windows command window. You need to add the full path to gswin32c.exe.

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Matthias Pospiech 2012-3-4

The full path is the most unwanted solution, although obvious.

The whole code worked on other computers, so I need to know what to fix.

And if matlab handles the path different than windows I need to know how.

Daniel Shub 2012-3-5

If you look at export_fig Oliver hard coded the paths. It might be unwanted, but it is probably the best you can do.

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Answer 2

Oliver Woodford 2012-3-8

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https://ww2.mathworks.cn/matlabcentral/answers/31120-execution-of-external-program-fails#answer_40102

I suggest you use the ghostcript function that comes with export_fig. It uses a full path if it needs to, but sets it automatically on each pc. You will also need to include the user_string function too.