pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-63334-DickGossipsR4.ps) >>/Users/jc/w/tmp/Tune-63334-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/r32/DickGossipsR4.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-63334-DickGossipsR4.abc 816 ABC music file with the extracted tune(s)
Tune-63334-DickGossipsR4.ps 36021 PostScript
Tune-63334-DickGossipsR4.txt 816 Plain-text file with the extracted tune(s)
Tune-63334-get.log 4515 Log file, useful mostly for debugging
These files should be available for 24 hours.