Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/15272_Jenny_and_I.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5884-all.ps) >>/Users/jc/w/tmp/Tune-5884-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/15272_Jenny_and_I.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_58840.log 282928 Log file, useful mostly for debugging
Coll_58843.log 263256 Log file, useful mostly for debugging
Form_58840.log 852 Log file, useful mostly for debugging
Form_58844.log 1654 Log file, useful mostly for debugging
Form_58849.log 966 Log file, useful mostly for debugging
Tune-5884-all.abc 169 ABC music file with the extracted tune(s)
Tune-5884-all.ps 6 PostScript
Tune-5884-all.txt 169 Plain-text file with the extracted tune(s)
Tune-5884-get.log 4047 Log file, useful mostly for debugging
Tune-58840-get.log 1638 Log file, useful mostly for debugging
Tune-58841-get.log 18384 Log file, useful mostly for debugging
Tune-58843-get.log 3748 Log file, useful mostly for debugging
Tune-58845-10301_Nymph-001.svg 18118 Scalable Vector Graphics format
Tune-58845-10301_Nymph.abc 562 ABC music file with the extracted tune(s)
Tune-58845-10301_Nymph.txt 562 Plain-text file with the extracted tune(s)
Tune-58845-get.log 3962 Log file, useful mostly for debugging
These files should be available for 24 hours.