pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12301-0633_WALK_ALONG_JOHN.ps) >>/Users/jc/w/tmp/Tune-12301-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/BostonCollection/0633_WALK_ALONG_JOHN.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-12301-0633_WALK_ALONG_JOHN.abc 633 ABC music file with the extracted tune(s)
Tune-12301-0633_WALK_ALONG_JOHN.ps 36388 PostScript
Tune-12301-0633_WALK_ALONG_JOHN.txt 633 Plain-text file with the extracted tune(s)
Tune-12301-Jean_Henry_dAnglebert_PdC2.abc 163 ABC music file with the extracted tune(s)
Tune-12301-Jean_Henry_dAnglebert_PdC2.txt 163 Plain-text file with the extracted tune(s)
Tune-12301-get.log 8234 Log file, useful mostly for debugging
These files should be available for 24 hours.