Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Brown_Soffe/0502_Handels_Clarinet.abc/misc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-80838-misc.ps) >>/Users/jc/w/tmp/Tune-80838-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Brown_Soffe/0502_Handels_Clarinet.abc/misc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-80838-get.log 10282 Log file, useful mostly for debugging
Tune-80838-misc.abc 170 ABC music file with the extracted tune(s)
Tune-80838-misc.ps 6 PostScript
Tune-80838-misc.txt 170 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.