Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/tune/Stewart_SCAJMR_1784-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3689-Stewart_SCAJMR_1784-V1.ps) >>/Users/jc/w/tmp/Tune-3689-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/tune/Stewart_SCAJMR_1784-V1.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_36890.log 155816 Log file, useful mostly for debugging
Tune-3689-Stewart_SCAJMR_1784-V1.abc 159 ABC music file with the extracted tune(s)
Tune-3689-Stewart_SCAJMR_1784-V1.ps 6 PostScript
Tune-3689-Stewart_SCAJMR_1784-V1.txt 159 Plain-text file with the extracted tune(s)
Tune-3689-get.log 14173 Log file, useful mostly for debugging
Tune-36890-get.log 8097 Log file, useful mostly for debugging
Tune-36891-get.log 5465 Log file, useful mostly for debugging
Tune-36892-get.log 8467 Log file, useful mostly for debugging
Tune-36893-get.log 12765 Log file, useful mostly for debugging
Tune-36894-get.log 4971 Log file, useful mostly for debugging
Tune-36897-get.log 8065 Log file, useful mostly for debugging
These files should be available for 24 hours.