Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/15211_Aileen_a_roon.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-586-all.ps) >>/Users/jc/w/tmp/Tune-586-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/15211_Aileen_a_roon.abc/all

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Coll_58646.log 141615 Log file, useful mostly for debugging
Form_58602.log 834 Log file, useful mostly for debugging
Form_58651.log 908 Log file, useful mostly for debugging
Form_58685.log 818 Log file, useful mostly for debugging
Tune-586-all.abc 171 ABC music file with the extracted tune(s)
Tune-586-all.ps 6 PostScript
Tune-586-all.txt 171 Plain-text file with the extracted tune(s)
Tune-586-get.log 4042 Log file, useful mostly for debugging
Tune-58616-get.log 4002 Log file, useful mostly for debugging
Tune-58626-get.log 3260 Log file, useful mostly for debugging
Tune-58636-get.log 4020 Log file, useful mostly for debugging
Tune-58657-get.log 3876 Log file, useful mostly for debugging
Tune-58669-get.log 5621 Log file, useful mostly for debugging
Tune-58692-get.log 4630 Log file, useful mostly for debugging
These files should be available for 24 hours.