Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Rare_Small/MichaelDabney_12Minuets12Dances-1760-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3676-MichaelDabney_12Minuets12Dances-1760-V1.ps) >>/Users/jc/w/tmp/Tune-3676-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Rare_Small/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_36760.log 290412 Log file, useful mostly for debugging
Coll_36762.log 1306544 Log file, useful mostly for debugging
Tune-3676-MichaelDabney_12Minuets12Dances-1760-V1.abc 182 ABC music file with the extracted tune(s)
Tune-3676-MichaelDabney_12Minuets12Dances-1760-V1.ps 6 PostScript
Tune-3676-MichaelDabney_12Minuets12Dances-1760-V1.txt 182 Plain-text file with the extracted tune(s)
Tune-3676-get.log 4709 Log file, useful mostly for debugging
Tune-36761-get.log 4488 Log file, useful mostly for debugging
Tune-36764-get.log 6480 Log file, useful mostly for debugging
Tune-36765-get.log 15734 Log file, useful mostly for debugging
Tune-36766-get.log 6745 Log file, useful mostly for debugging
Tune-36767-get.log 3884 Log file, useful mostly for debugging
Tune-36768-get.log 14565 Log file, useful mostly for debugging
Tune-36769-get.log 3260 Log file, useful mostly for debugging
These files should be available for 24 hours.