pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1229-el_cahon.ps) >>/Users/jc/w/tmp/Tune-1229-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/jazz/el_cahon.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_12292.log 464011 Log file, useful mostly for debugging
Coll_12296.log 936417 Log file, useful mostly for debugging
Tune-1229-el_cahon.abc 1094 ABC music file with the extracted tune(s)
Tune-1229-el_cahon.ps 42715 PostScript
Tune-1229-el_cahon.txt 1094 Plain-text file with the extracted tune(s)
Tune-1229-get.log 4312 Log file, useful mostly for debugging
Tune-12290-get.log 4530 Log file, useful mostly for debugging
Tune-12293-get.log 12352 Log file, useful mostly for debugging
These files should be available for 24 hours.