pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5320-21872_MARTHA_3.ps) >>/Users/jc/w/tmp/Tune-5320-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21872_MARTHA_3.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_53200.log 261851 Log file, useful mostly for debugging
Coll_53204.log 1168518 Log file, useful mostly for debugging
Find_53202.log 1621 Log file, useful mostly for debugging
Form_53206.log 829 Log file, useful mostly for debugging
Tune-5320-21872_MARTHA_3.abc 849 ABC music file with the extracted tune(s)
Tune-5320-21872_MARTHA_3.ps 37070 PostScript
Tune-5320-21872_MARTHA_3.txt 849 Plain-text file with the extracted tune(s)
Tune-5320-get.log 8113 Log file, useful mostly for debugging
Tune-53204-get.log 3586 Log file, useful mostly for debugging
Tune-53205-get.log 5939 Log file, useful mostly for debugging
These files should be available for 24 hours.