pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-95721-10961_Ally_Croaker.ps) >>/Users/jc/w/tmp/Tune-95721-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/10961_Ally_Croaker.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_95721.log 266609 Log file, useful mostly for debugging
Tune-95721-10961_Ally_Croaker.abc 904 ABC music file with the extracted tune(s)
Tune-95721-10961_Ally_Croaker.ps 37852 PostScript
Tune-95721-10961_Ally_Croaker.txt 904 Plain-text file with the extracted tune(s)
Tune-95721-get.log 4586 Log file, useful mostly for debugging
These files should be available for 24 hours.