Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/march/JamesOswald_CPC-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4241-JamesOswald_CPC-abc1.ps) >>/Users/jc/w/tmp/Tune-4241-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/march/JamesOswald_CPC-abc1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_4241.log 461209 Log file, useful mostly for debugging
Coll_42410.log 457009 Log file, useful mostly for debugging
Coll_42412.log 259611 Log file, useful mostly for debugging
Coll_42414.log 455610 Log file, useful mostly for debugging
Coll_42415.log 475211 Log file, useful mostly for debugging
Coll_42419.log 279209 Log file, useful mostly for debugging
Tune-4241-JamesOswald_CPC-abc1.abc 158 ABC music file with the extracted tune(s)
Tune-4241-JamesOswald_CPC-abc1.ps 6 PostScript
Tune-4241-JamesOswald_CPC-abc1.txt 158 Plain-text file with the extracted tune(s)
Tune-4241-get.log 4280 Log file, useful mostly for debugging
Tune-42418-get.log 1601 Log file, useful mostly for debugging
These files should be available for 24 hours.