pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2991-Kingdom_Coming.ps) >>/Users/jc/w/tmp/Tune-2991-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/homepages.inf.ed.ac.uk/s0570628/Kingdom_Coming.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-2991-Kingdom_Coming.abc 0 ABC music file with the extracted tune(s)
Tune-2991-Kingdom_Coming.ps 0 PostScript
Tune-2991-get.log 0 Log file, useful mostly for debugging
Tune-29910-KingstonLacyHouseWaltz-001.svg 16923 Scalable Vector Graphics format
Tune-29910-KingstonLacyHouseWaltz.abc 411 ABC music file with the extracted tune(s)
Tune-29910-KingstonLacyHouseWaltz.txt 411 Plain-text file with the extracted tune(s)
Tune-29910-get.log 4944 Log file, useful mostly for debugging
Tune-29912-Playford1.abc 448 ABC music file with the extracted tune(s)
Tune-29912-Playford1.txt 448 Plain-text file with the extracted tune(s)
Tune-29912-get.log 153293 Log file, useful mostly for debugging
These files should be available for 24 hours.