<p>Ack, sorry, I didn't realize you were using mlpack 1.0.12.  In that case can you set the breakpoint at <code>log.cpp:125</code>?  I have tried to reproduce the issue on an OS X system with a handful of randomly generated datasets, but I haven't had any luck.  If you can make <code>train5.csv</code> and/or <code>test5.csv</code> available, that could help also.  Thanks!</p>

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