dos/system error

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Dustin
Dustin 2011-5-25
I am trying to run an EXE from the MATLAB (r2010b on Windows XP) command prompt, and am not able to do so.
I can easily use
dos('dir');
and list the contents of the directory, but running my EXE like:
dos('segment 0.8 100 100 tmpim1269868.ppm tmpimsp1269868.ppm');
does not work. The command prompt is available to me almost instantaneously, and the ans variable contains the value -1.0737e+9.
I am able to run the EXE from a DOS prompt with the exact same command, and generate the correct result, but when the DOS prompt is called from MATLAB, it just doesn't seem to be working. I have tried creating a BAT file containing the execution call in the directory and running the same by using the dos command, but to no avail.
The same occurs when I use system instead of dos.
Any advice at all would be appreciated.

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采纳的回答

Dustin
Dustin 2011-5-25
OK, I think I missed the most obvious thing. I just restarted MATLAB and everything is hunky-dory. Code's running absolutely fine now.

更多回答（1 个）

Jan
Jan 2011-5-25
Do you catch the 2 output arguments from the DOS command? ANS should be 0 for successful processing, and not 0 otherwise. Try:
[a, b] = system(['segment 0.8 100 100 ', ...
'tmpim1269868.ppm tmpimsp1269868.ppm']);
Are you sure that "segment.exe" and the picture(s) is(are) available in the current folder? Does an error message appear in the output [b]?
  1 个评论
Dustin
Dustin 2011-5-25
Hi Jan,
Thanks for your reply.
I tried this and a is -1.0737e+9, while b is ''. So no new information available.
Yes, the EXE and the image are available in the folder. If the image is not available, the program outputs "loading input image" and exits. I do not get any output at all from the program though, so I am finding it really difficult to find out what's going wrong.

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