Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/16192_Away_Whigs_away.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5470-all.ps) >>/Users/jc/w/tmp/Tune-5470-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/16192_Away_Whigs_away.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_54701.log 263256 Log file, useful mostly for debugging
Coll_54704.log 266066 Log file, useful mostly for debugging
Coll_54708.log 280118 Log file, useful mostly for debugging
Coll_54709.log 273092 Log file, useful mostly for debugging
Form_5470.log 865 Log file, useful mostly for debugging
Form_54700.log 849 Log file, useful mostly for debugging
Form_54704.log 825 Log file, useful mostly for debugging
Tune-5470-all.abc 173 ABC music file with the extracted tune(s)
Tune-5470-all.ps 6 PostScript
Tune-5470-all.txt 173 Plain-text file with the extracted tune(s)
Tune-5470-get.log 4069 Log file, useful mostly for debugging
Tune-54702-get.log 5185 Log file, useful mostly for debugging
Tune-54707-get.log 3775 Log file, useful mostly for debugging
These files should be available for 24 hours.