pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-36410-Moving_Cloud_1.ps) >>/Users/jc/w/tmp/Tune-36410-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Perron-Miller/Moving_Cloud_1.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_36410.log 1213130 Log file, useful mostly for debugging
Tune-36410-Moving_Cloud_1.abc 546 ABC music file with the extracted tune(s)
Tune-36410-Moving_Cloud_1.ps 36142 PostScript
Tune-36410-Moving_Cloud_1.txt 546 Plain-text file with the extracted tune(s)
Tune-36410-get.log 5010 Log file, useful mostly for debugging
These files should be available for 24 hours.