Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/SDA/JamesOswald_CPC-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6230-JamesOswald_CPC-abc2.ps) >>/Users/jc/w/tmp/Tune-6230-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SDA/JamesOswald_CPC-abc2.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_62307.log 160367 Log file, useful mostly for debugging
Tune-6230-JamesOswald_CPC-abc2.abc 156 ABC music file with the extracted tune(s)
Tune-6230-JamesOswald_CPC-abc2.ps 6 PostScript
Tune-6230-JamesOswald_CPC-abc2.txt 156 Plain-text file with the extracted tune(s)
Tune-6230-get.log 4266 Log file, useful mostly for debugging
Tune-62301-get.log 8040 Log file, useful mostly for debugging
Tune-62302-get.log 9825 Log file, useful mostly for debugging
Tune-62303-get.log 1396 Log file, useful mostly for debugging
Tune-62306-get.log 3092 Log file, useful mostly for debugging
Tune-62307-get.log 4324 Log file, useful mostly for debugging
Tune-62309-get.log 8705 Log file, useful mostly for debugging
These files should be available for 24 hours.