Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21451_the_Shepherd_of_Neath.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6084-all.ps) >>/Users/jc/w/tmp/Tune-6084-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21451_the_Shepherd_of_Neath.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
Form_60842.log 844 Log file, useful mostly for debugging
Form_60846.log 829 Log file, useful mostly for debugging
List60843.log 160 Log file, useful mostly for debugging
List60848.log 160 Log file, useful mostly for debugging
Tune-6084-all.abc 179 ABC music file with the extracted tune(s)
Tune-6084-all.ps 6 PostScript
Tune-6084-all.txt 179 Plain-text file with the extracted tune(s)
Tune-6084-get.log 21707 Log file, useful mostly for debugging
Tune-60841-get.log 4687 Log file, useful mostly for debugging
Tune-60845-033_Barley_Mow.abc 766 ABC music file with the extracted tune(s)
Tune-60845-033_Barley_Mow.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-60845-033_Barley_Mow.ps 36940 PostScript
Tune-60845-033_Barley_Mow.txt 766 Plain-text file with the extracted tune(s)
Tune-60845-get.log 5454 Log file, useful mostly for debugging
Tune-60847-get.log 3661 Log file, useful mostly for debugging
Tune-60848-get.log 5047 Log file, useful mostly for debugging
These files should be available for 24 hours.