Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/JamesOswald/CPC/16061_Patie_and_Peggy.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8582-all.ps) >>/Users/jc/w/tmp/Tune-8582-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JamesOswald/CPC/16061_Patie_and_Peggy.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-8582-all.abc 173 ABC music file with the extracted tune(s)
Tune-8582-all.ps 6 PostScript
Tune-8582-all.txt 173 Plain-text file with the extracted tune(s)
Tune-8582-get.log 4069 Log file, useful mostly for debugging
Tune-85821-10301_Nymph.abc 562 ABC music file with the extracted tune(s)
Tune-85821-10301_Nymph.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-85821-10301_Nymph.ps 35068 PostScript
Tune-85821-10301_Nymph.txt 562 Plain-text file with the extracted tune(s)
Tune-85821-get.log 5158 Log file, useful mostly for debugging
Tune-85828-AGSt04.abc 462 ABC music file with the extracted tune(s)
Tune-85828-AGSt04.txt 462 Plain-text file with the extracted tune(s)
Tune-85828-get.log 4220 Log file, useful mostly for debugging
These files should be available for 24 hours.