Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/16030_.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4953-all.ps) >>/Users/jc/w/tmp/Tune-4953-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/16030_.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_4953.log 263256 Log file, useful mostly for debugging
Coll_49538.log 266066 Log file, useful mostly for debugging
Tune-4953-all.abc 158 ABC music file with the extracted tune(s)
Tune-4953-all.ps 6 PostScript
Tune-4953-all.txt 158 Plain-text file with the extracted tune(s)
Tune-4953-get.log 3981 Log file, useful mostly for debugging
Tune-49534-get.log 3845 Log file, useful mostly for debugging
Tune-49535-get.log 9627 Log file, useful mostly for debugging
Tune-49537-030_the_Alphabet.abc 806 ABC music file with the extracted tune(s)
Tune-49537-030_the_Alphabet.pdf 13405 Portable Data Format
Tune-49537-030_the_Alphabet.ps 34000 PostScript
Tune-49537-030_the_Alphabet.txt 806 Plain-text file with the extracted tune(s)
Tune-49537-get.log 9307 Log file, useful mostly for debugging
These files should be available for 24 hours.