Question: Problem -- Matrix solution -- again

I am uploading three files. They all do the same thing with slightly different datasets. files 29 and 27 obtain rasonable solutions, but 24 does not.

Could you help me figure out what the problem is and how such problems can be identified -- so that I can make the necessary changes to them.

I have the same problem with other datasets.

Thanks.

Download 2031_29.mws
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Download 2031_27.mws
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Download 2031_24Problem.mws
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