Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/ScotsMusicalMuseumV5/GentlemansMagazine.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3069-GentlemansMagazine.ps) >>/Users/jc/w/tmp/Tune-3069-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ScotsMusicalMuseumV5/GentlemansMagazine.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_30699.log 159066 Log file, useful mostly for debugging
Tune-3069-GentlemansMagazine.abc 171 ABC music file with the extracted tune(s)
Tune-3069-GentlemansMagazine.ps 6 PostScript
Tune-3069-GentlemansMagazine.txt 171 Plain-text file with the extracted tune(s)
Tune-3069-get.log 4332 Log file, useful mostly for debugging
Tune-30690-get.log 14022 Log file, useful mostly for debugging
Tune-30691-get.log 3544 Log file, useful mostly for debugging
Tune-30692-get.log 8544 Log file, useful mostly for debugging
Tune-30695-get.log 4778 Log file, useful mostly for debugging
Tune-30698-get.log 4028 Log file, useful mostly for debugging
Tune-30699-get.log 7390 Log file, useful mostly for debugging
These files should be available for 24 hours.