Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/session/Oivan_Ilo/Unknown-G--.abc/new"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1477-new.ps) >>/Users/jc/w/tmp/Tune-1477-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/session/Oivan_Ilo/Unknown-G--.abc/new

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_14776.log 148610 Log file, useful mostly for debugging
Tune-1477-30432_Chaffes_Hornpipe.abc 738 ABC music file with the extracted tune(s)
Tune-1477-30432_Chaffes_Hornpipe.ps 35434 PostScript
Tune-1477-30432_Chaffes_Hornpipe.txt 738 Plain-text file with the extracted tune(s)
Tune-1477-get.log 8899 Log file, useful mostly for debugging
Tune-1477-new.abc 160 ABC music file with the extracted tune(s)
Tune-1477-new.ps 6 PostScript
Tune-1477-new.txt 160 Plain-text file with the extracted tune(s)
Tune-14777-31531_.abc 33 ABC music file with the extracted tune(s)
Tune-14777-31531_.ps 6 PostScript
Tune-14777-31531_.txt 33 Plain-text file with the extracted tune(s)
Tune-14777-get.log 3864 Log file, useful mostly for debugging
These files should be available for 24 hours.