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MIDI playback error on Sansa e250: "null waveform"

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kfb:
I tried playing a MIDI file and no sound comes out, just the message "crap...null waveform..." printed out on the display repeatedly.  I followed the instructions at http://www.rockbox.org/twiki/bin/view/Main/PluginMidiPlay to download and copy over the patchset to .rockbox/patchset and verified that the patch files were in the right location.  I did this twice to make sure.  I also tried several different MIDI files.  However, I still get the same error message each time.  Any ideas?

Chronon:
I'm not familiar with that error message.  Shouldn't it complain about a missing patchset if that's the problem?  Which revision of Rockbox are you running?

Hmm.. I'm sorry that I can't be of much help here.  For what it's worth, I haven't had any problems playing back MIDI files on my Gigabeat. 

nls:
Could you make one of these files available somewhere or link to one perhaps so we can take a look?

zajacattack:
Either way, most MIDI files still won't play on the PortalPlayer targets.

Chronon:
Have you encountered this particular error, zajacattack?

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