Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21403_Jack_of_the_Green.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5492-all.ps) >>/Users/jc/w/tmp/Tune-5492-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/21403_Jack_of_the_Green.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_54922.log 337721 Log file, useful mostly for debugging
Coll_54923.log 247801 Log file, useful mostly for debugging
Coll_54924.log 260446 Log file, useful mostly for debugging
Coll_54928.log 261851 Log file, useful mostly for debugging
Form_54922.log 825 Log file, useful mostly for debugging
Form_54928.log 829 Log file, useful mostly for debugging
Tune-5492-all.abc 175 ABC music file with the extracted tune(s)
Tune-5492-all.ps 6 PostScript
Tune-5492-all.txt 175 Plain-text file with the extracted tune(s)
Tune-5492-get.log 4081 Log file, useful mostly for debugging
Tune-54920-get.log 5068 Log file, useful mostly for debugging
Tune-54922-get.log 14582 Log file, useful mostly for debugging
Tune-54923-21091_SECOND_STAR_HORNPIPE-001.svg 26199 Scalable Vector Graphics format
Tune-54923-21091_SECOND_STAR_HORNPIPE.abc 671 ABC music file with the extracted tune(s)
Tune-54923-21091_SECOND_STAR_HORNPIPE.txt 671 Plain-text file with the extracted tune(s)
Tune-54923-get.log 4467 Log file, useful mostly for debugging
Tune-54929-get.log 3586 Log file, useful mostly for debugging
These files should be available for 24 hours.