pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-86356-000_Title.ps) >>/Users/jc/w/tmp/Tune-86356-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnMacphersonMulhollan/000_Title.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-86356-000_Title.abc 953 ABC music file with the extracted tune(s)
Tune-86356-000_Title.ps 32142 PostScript
Tune-86356-000_Title.txt 953 Plain-text file with the extracted tune(s)
Tune-86356-get.log 8636 Log file, useful mostly for debugging
Tune-86356-polka.abc 171 ABC music file with the extracted tune(s)
Tune-86356-polka.ps 6 PostScript
Tune-86356-polka.txt 171 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.