Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1811/Stewart_SCAJMR_1784-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2541-Stewart_SCAJMR_1784-V1.ps) >>/Users/jc/w/tmp/Tune-2541-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1811/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_25412.log 161667 Log file, useful mostly for debugging
Tune-2541-Stewart_SCAJMR_1784-V1.abc 159 ABC music file with the extracted tune(s)
Tune-2541-Stewart_SCAJMR_1784-V1.ps 6 PostScript
Tune-2541-Stewart_SCAJMR_1784-V1.txt 159 Plain-text file with the extracted tune(s)
Tune-2541-get.log 9874 Log file, useful mostly for debugging
Tune-25412-get.log 8409 Log file, useful mostly for debugging
Tune-25414-get.log 5646 Log file, useful mostly for debugging
Tune-25415-get.log 8421 Log file, useful mostly for debugging
Tune-25416-get.log 4682 Log file, useful mostly for debugging
Tune-25418-get.log 4004 Log file, useful mostly for debugging
These files should be available for 24 hours.