pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-32092-32002_JOHN_O_GROATS_JIG.ps) >>/Users/jc/w/tmp/Tune-32092-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/32002_JOHN_O_GROATS_JIG.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_32092.log 838 Log file, useful mostly for debugging
Tune-32092-32002_JOHN_O_GROATS_JIG.abc 520 ABC music file with the extracted tune(s)
Tune-32092-32002_JOHN_O_GROATS_JIG.ps 34513 PostScript
Tune-32092-32002_JOHN_O_GROATS_JIG.txt 520 Plain-text file with the extracted tune(s)
Tune-32092-get.log 4760 Log file, useful mostly for debugging
These files should be available for 24 hours.