Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/JamesOswald/CPC/20791_Artless_Annie.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-89462-all.ps) >>/Users/jc/w/tmp/Tune-89462-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JamesOswald/CPC/20791_Artless_Annie.abc/all

Error exit status 256; here are some files to check:

[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-89462-Irish_Lottery.abc 922 ABC music file with the extracted tune(s)
Tune-89462-Irish_Lottery.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-89462-Irish_Lottery.ps 35229 PostScript
Tune-89462-Irish_Lottery.txt 922 Plain-text file with the extracted tune(s)
Tune-89462-all.abc 171 ABC music file with the extracted tune(s)
Tune-89462-all.ps 6 PostScript
Tune-89462-all.txt 171 Plain-text file with the extracted tune(s)
Tune-89462-get.log 9283 Log file, useful mostly for debugging
These files should be available for 24 hours.