Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Brown_Soffe/0901_Quick_March.abc/misc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78142-misc.ps) >>/Users/jc/w/tmp/Tune-78142-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Brown_Soffe/0901_Quick_March.abc/misc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-78142-get.log 9376 Log file, useful mostly for debugging
Tune-78142-misc.abc 165 ABC music file with the extracted tune(s)
Tune-78142-misc.ps 6 PostScript
Tune-78142-misc.txt 165 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.