pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-70978-OER_THE_BOWS_TO_BALLINDALLOCH_37_2.ps) >>/Users/jc/w/tmp/Tune-70978-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/corneymusers/OER_THE_BOWS_TO_BALLINDALLOCH_37_2.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-70978-OER_THE_BOWS_TO_BALLINDALLOCH_37_2.abc 610 ABC music file with the extracted tune(s)
Tune-70978-OER_THE_BOWS_TO_BALLINDALLOCH_37_2.ps 39583 PostScript
Tune-70978-OER_THE_BOWS_TO_BALLINDALLOCH_37_2.txt 610 Plain-text file with the extracted tune(s)
Tune-70978-get.log 5082 Log file, useful mostly for debugging
These files should be available for 24 hours.