pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-36712-1063.ps) >>/Users/jc/w/tmp/Tune-36712-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/1063=Lady_Charlotte_Murrays_Jig.abc2.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_36712.log 434610 Log file, useful mostly for debugging
Tune-36712-1063.abc 1077 ABC music file with the extracted tune(s)
Tune-36712-1063.ps 39596 PostScript
Tune-36712-1063.txt 1077 Plain-text file with the extracted tune(s)
Tune-36712-get.log 4715 Log file, useful mostly for debugging
These files should be available for 24 hours.