pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-65012-Book_Snoa.ps) >>/Users/jc/w/tmp/Tune-65012-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/scand/Book_Snoa.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_65012.log 916822 Log file, useful mostly for debugging
Form_65012.log 884 Log file, useful mostly for debugging
Tune-65012-Book_Snoa.abc 14738 ABC music file with the extracted tune(s)
Tune-65012-Book_Snoa.ps 198211 PostScript
Tune-65012-Book_Snoa.txt 14738 Plain-text file with the extracted tune(s)
Tune-65012-get.log 13380 Log file, useful mostly for debugging
These files should be available for 24 hours.