pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4841-21041_STEPHENSONS_FANCY_HORNPIPE.ps) >>/Users/jc/w/tmp/Tune-4841-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21041_STEPHENSONS_FANCY_HORNPIPE.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_48412.log 97313 Log file, useful mostly for debugging
Coll_48414.log 296977 Log file, useful mostly for debugging
Coll_48417.log 144095 Log file, useful mostly for debugging
Coll_48419.log 142804 Log file, useful mostly for debugging
Form_48410.log 857 Log file, useful mostly for debugging
Form_48413.log 2096 Log file, useful mostly for debugging
Form_48417.log 2078 Log file, useful mostly for debugging
Tune-4841-21041_STEPHENSONS_FANCY_HORNPIPE.abc 715 ABC music file with the extracted tune(s)
Tune-4841-21041_STEPHENSONS_FANCY_HORNPIPE.ps 39499 PostScript
Tune-4841-21041_STEPHENSONS_FANCY_HORNPIPE.txt 715 Plain-text file with the extracted tune(s)
Tune-4841-get.log 14400 Log file, useful mostly for debugging
Tune-48415-get.log 5074 Log file, useful mostly for debugging
These files should be available for 24 hours.