Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/AdvancedSD/MichaelDabney_12Minuets12Dances-1760-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4053-MichaelDabney_12Minuets12Dances-1760-V1.ps) >>/Users/jc/w/tmp/Tune-4053-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/AdvancedSD/MichaelDabney_12Minuets12Dances-1760-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_40533.log 287611 Log file, useful mostly for debugging
Tune-4053-MichaelDabney_12Minuets12Dances-1760-V1.abc 182 ABC music file with the extracted tune(s)
Tune-4053-MichaelDabney_12Minuets12Dances-1760-V1.ps 6 PostScript
Tune-4053-MichaelDabney_12Minuets12Dances-1760-V1.txt 182 Plain-text file with the extracted tune(s)
Tune-4053-get.log 9333 Log file, useful mostly for debugging
Tune-40530-get.log 6728 Log file, useful mostly for debugging
Tune-40531-get.log 9962 Log file, useful mostly for debugging
Tune-40532-get.log 9563 Log file, useful mostly for debugging
Tune-40533-get.log 20611 Log file, useful mostly for debugging
Tune-40535-get.log 13747 Log file, useful mostly for debugging
Tune-40538-get.log 9094 Log file, useful mostly for debugging
These files should be available for 24 hours.