pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-61778-Jessie_Walker.ps) >>/Users/jc/w/tmp/Tune-61778-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/by/Muriel_Johnstone/reel/Jessie_Walker.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-61778-Jessie_Walker.abc 378 ABC music file with the extracted tune(s)
Tune-61778-Jessie_Walker.ps 35730 PostScript
Tune-61778-Jessie_Walker.txt 378 Plain-text file with the extracted tune(s)
Tune-61778-get.log 4828 Log file, useful mostly for debugging
These files should be available for 24 hours.