Identifying a problem with fopen

Ian
2011 4 4
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So I'm trying to use MATLAB to analyze a .c3d file (I don't know how many of you are familiar with OptiTrack ARENA). I want to open the file using fopen, and open it in it's native format. However, fopen cannot open the file for some reason. Is there a way to find out why, and possibly rectify the situation? I'm still not entirely sure whether the problem is on the MATLAB or ARENA end, but help me out here.

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Walter Roberson
Walter Roberson 2011-4-4

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If you use
[fid, msg] = fopen('TheName.c3d', 'r');
then what msg is returned ?

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Ian
Ian 2011-4-4
Ah, there we go. It told me that the file couldn't be found, and I know why. Apparently I was in the wrong directory and didn't notice it, so the file couldn't be opened. I fixed it, and now msg is just an empty string. Thanks. The program still doesn't work, but it's not because of fopen now.
i had the same problem and now my code is working. thanks.

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