Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/12230_.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3457-all.ps) >>/Users/jc/w/tmp/Tune-3457-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/12230_.abc/all

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_3457.log 263256 Log file, useful mostly for debugging
Coll_34577.log 527917 Log file, useful mostly for debugging
Form_34573.log 1945 Log file, useful mostly for debugging
Tune-3457-all.abc 158 ABC music file with the extracted tune(s)
Tune-3457-all.ps 6 PostScript
Tune-3457-all.txt 158 Plain-text file with the extracted tune(s)
Tune-3457-get.log 3979 Log file, useful mostly for debugging
Tune-34570-get.log 3649 Log file, useful mostly for debugging
Tune-34578-get.log 3640 Log file, useful mostly for debugging
Tune-34579-get.log 3948 Log file, useful mostly for debugging
These files should be available for 24 hours.