Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/abc/session/RoM/Jingle_Bells-G-32-2.abc/xmas"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-19592-xmas.ps) >>/Users/jc/w/tmp/Tune-19592-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/session/RoM/Jingle_Bells-G-32-2.abc/xmas

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_19592.log 130550 Log file, useful mostly for debugging
Tune-19592-get.log 13617 Log file, useful mostly for debugging
Tune-19592-xmas.abc 167 ABC music file with the extracted tune(s)
Tune-19592-xmas.ps 6 PostScript
Tune-19592-xmas.txt 167 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.