Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21032_the_Irish_Lilt.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5646-all.ps) >>/Users/jc/w/tmp/Tune-5646-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21032_the_Irish_Lilt.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_56467.log 266066 Log file, useful mostly for debugging
Form_56460.log 1803 Log file, useful mostly for debugging
Form_56469.log 964 Log file, useful mostly for debugging
Tune-5646-all.abc 172 ABC music file with the extracted tune(s)
Tune-5646-all.ps 6 PostScript
Tune-5646-all.txt 172 Plain-text file with the extracted tune(s)
Tune-5646-get.log 7746 Log file, useful mostly for debugging
Tune-56462-8054_Abel_Drugger.abc 423 ABC music file with the extracted tune(s)
Tune-56462-8054_Abel_Drugger.ps 34764 PostScript
Tune-56462-8054_Abel_Drugger.txt 423 Plain-text file with the extracted tune(s)
Tune-56462-get.log 4684 Log file, useful mostly for debugging
Tune-56464-get.log 4443 Log file, useful mostly for debugging
Tune-56468-8126_Derby_Captain-001.svg 12347 Scalable Vector Graphics format
Tune-56468-8126_Derby_Captain.abc 359 ABC music file with the extracted tune(s)
Tune-56468-8126_Derby_Captain.txt 359 Plain-text file with the extracted tune(s)
Tune-56468-get.log 4298 Log file, useful mostly for debugging
These files should be available for 24 hours.