Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/ONeills/Rare_Small/0058_Irish_Billy.abc/book0"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1164-book0.ps) >>/Users/jc/w/tmp/Tune-1164-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ONeills/Rare_Small/0058_Irish_Billy.abc/book0

Error exit status 256; here are some files to check:

[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_11645.log 264661 Log file, useful mostly for debugging
Coll_11646.log 391462 Log file, useful mostly for debugging
Coll_11649.log 522297 Log file, useful mostly for debugging
Form_11643.log 2897 Log file, useful mostly for debugging
Tune-1164-book0.abc 173 ABC music file with the extracted tune(s)
Tune-1164-book0.ps 6 PostScript
Tune-1164-book0.txt 173 Plain-text file with the extracted tune(s)
Tune-1164-get.log 13799 Log file, useful mostly for debugging
Tune-11640-get.log 3172 Log file, useful mostly for debugging
Tune-11644-get.log 5718 Log file, useful mostly for debugging
Tune-11647-get.log 3675 Log file, useful mostly for debugging
Tune-11649-get.log 3595 Log file, useful mostly for debugging
These files should be available for 24 hours.