Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/15191_the_Old_Jew.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1640-all.ps) >>/Users/jc/w/tmp/Tune-1640-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/15191_the_Old_Jew.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_1640.log 511057 Log file, useful mostly for debugging
Coll_16405.log 249206 Log file, useful mostly for debugging
Tune-1640-all.abc 169 ABC music file with the extracted tune(s)
Tune-1640-all.ps 6 PostScript
Tune-1640-all.txt 169 Plain-text file with the extracted tune(s)
Tune-1640-get.log 4049 Log file, useful mostly for debugging
Tune-16402-get.log 4772 Log file, useful mostly for debugging
Tune-16403-get.log 3728 Log file, useful mostly for debugging
Tune-16404-get.log 4573 Log file, useful mostly for debugging
Tune-16405-get.log 3627 Log file, useful mostly for debugging
Tune-16407-get.log 5970 Log file, useful mostly for debugging
These files should be available for 24 hours.