Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/session/Oivan_Ilo/Suvivalssi-Em-64-6.abc/waltz"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4062-waltz.ps) >>/Users/jc/w/tmp/Tune-4062-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/session/Oivan_Ilo/Suvivalssi-Em-64-6.abc/waltz

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-4062-LordOfCarnarvansJegg.abc 251 ABC music file with the extracted tune(s)
Tune-4062-LordOfCarnarvansJegg.ps 32302 PostScript
Tune-4062-LordOfCarnarvansJegg.txt 251 Plain-text file with the extracted tune(s)
Tune-4062-get.log 8794 Log file, useful mostly for debugging
Tune-4062-waltz.abc 169 ABC music file with the extracted tune(s)
Tune-4062-waltz.ps 6 PostScript
Tune-4062-waltz.txt 169 Plain-text file with the extracted tune(s)
Tune-40626-UpTailsAll_PLFD1651_102.abc 303 ABC music file with the extracted tune(s)
Tune-40626-UpTailsAll_PLFD1651_102.pdf 10780 Portable Data Format
Tune-40626-UpTailsAll_PLFD1651_102.ps 31694 PostScript
Tune-40626-UpTailsAll_PLFD1651_102.txt 303 Plain-text file with the extracted tune(s)
Tune-40626-get.log 5702 Log file, useful mostly for debugging
These files should be available for 24 hours.