I can't recall the source right now, but I encountered a module called
Strangestest. In IT-format.
It appears to be an exceptional one, because big values are used there. The width is 23 channels, but each pattern has a length of 1024 steps and there are 80 different patterns in the pattern order..
Result (using v1.17.02.43):
The old small MP Player couldn't handle the file. OMPT of course could load and play, but then 'estimated time length' was shown as 3:24. Which is only enough, maybe exactly, with the length of one single pattern in this case.
No big deal of course. But after I saved the module in the XM-format, the MP Player worked, and OMPT showed the correct timelength : 167:14.
EDIT: Skip the XM-part. The conversion appears to be very crappy. Different speed of patterns, and missing large blocks of data.