pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-15642-3323-Princess_Augusta.ps) >>/Users/jc/w/tmp/Tune-15642-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/3323-Princess_Augusta.abc1.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_15642.log 443009 Log file, useful mostly for debugging
Tune-15642-3323-Princess_Augusta.abc 1133 ABC music file with the extracted tune(s)
Tune-15642-3323-Princess_Augusta.ps 40919 PostScript
Tune-15642-3323-Princess_Augusta.txt 1133 Plain-text file with the extracted tune(s)
Tune-15642-get.log 4842 Log file, useful mostly for debugging
These files should be available for 24 hours.