pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-72684-Up_the_Water.ps) >>/Users/jc/w/tmp/Tune-72684-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Thompson/Up_the_Water.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_72684.log 270283 Log file, useful mostly for debugging
Find_72684.log 1551 Log file, useful mostly for debugging
Tune-72684-Up_the_Water.abc 406 ABC music file with the extracted tune(s)
Tune-72684-Up_the_Water.ps 33785 PostScript
Tune-72684-Up_the_Water.txt 406 Plain-text file with the extracted tune(s)
Tune-72684-get.log 4473 Log file, useful mostly for debugging
These files should be available for 24 hours.