pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16336-4333-Morag.ps) >>/Users/jc/w/tmp/Tune-16336-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/4333-Morag.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_16336.log 870619 Log file, useful mostly for debugging
Tune-16336-4333-Morag.abc 1185 ABC music file with the extracted tune(s)
Tune-16336-4333-Morag.ps 41754 PostScript
Tune-16336-4333-Morag.txt 1185 Plain-text file with the extracted tune(s)
Tune-16336-get.log 4543 Log file, useful mostly for debugging
These files should be available for 24 hours.