Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21463_the_Brechin_Lilt.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-692-all.ps) >>/Users/jc/w/tmp/Tune-692-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21463_the_Brechin_Lilt.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
Find_69243.log 1503 Log file, useful mostly for debugging
Form_69247.log 1006 Log file, useful mostly for debugging
Form_69259.log 1032 Log file, useful mostly for debugging
Form_69272.log 984 Log file, useful mostly for debugging
Tune-692-all.abc 174 ABC music file with the extracted tune(s)
Tune-692-all.ps 6 PostScript
Tune-692-all.txt 174 Plain-text file with the extracted tune(s)
Tune-692-get.log 4062 Log file, useful mostly for debugging
Tune-69210-get.log 5394 Log file, useful mostly for debugging
Tune-69228-get.log 4355 Log file, useful mostly for debugging
Tune-69280-get.log 5994 Log file, useful mostly for debugging
Tune-69298-get.log 4729 Log file, useful mostly for debugging
These files should be available for 24 hours.