Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/20452_Wrquaharts_measure.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5871-all.ps) >>/Users/jc/w/tmp/Tune-5871-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JamesOswald/CPC/20452_Wrquaharts_measure.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_58714.log 263256 Log file, useful mostly for debugging
Form_58719.log 825 Log file, useful mostly for debugging
Tune-5871-all.abc 176 ABC music file with the extracted tune(s)
Tune-5871-all.ps 6 PostScript
Tune-5871-all.txt 176 Plain-text file with the extracted tune(s)
Tune-5871-get.log 4089 Log file, useful mostly for debugging
Tune-58710-get.log 3586 Log file, useful mostly for debugging
Tune-58711-get.log 5159 Log file, useful mostly for debugging
Tune-58716-get.log 3819 Log file, useful mostly for debugging
Tune-58718-143_Home_Sweet_Home.abc 2001 ABC music file with the extracted tune(s)
Tune-58718-143_Home_Sweet_Home.ps 40116 PostScript
Tune-58718-143_Home_Sweet_Home.txt 2001 Plain-text file with the extracted tune(s)
Tune-58718-get.log 8923 Log file, useful mostly for debugging
Tune-58719-get.log 7994 Log file, useful mostly for debugging
These files should be available for 24 hours.