Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/jpg/Remick.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4668-Remick.ps) >>/Users/jc/w/tmp/Tune-4668-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/jpg/Remick.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_4668.log 315534 Log file, useful mostly for debugging
Coll_46681.log 381412 Log file, useful mostly for debugging
Coll_46686.log 153217 Log file, useful mostly for debugging
Tune-4668-Remick.abc 142 ABC music file with the extracted tune(s)
Tune-4668-Remick.ps 6 PostScript
Tune-4668-Remick.txt 142 Plain-text file with the extracted tune(s)
Tune-4668-get.log 3974 Log file, useful mostly for debugging
Tune-46680-MichaelDabney_12Minuets12Dances-1760-V2.abc 174 ABC music file with the extracted tune(s)
Tune-46680-MichaelDabney_12Minuets12Dances-1760-V2.ps 6 PostScript
Tune-46680-MichaelDabney_12Minuets12Dances-1760-V2.txt 174 Plain-text file with the extracted tune(s)
Tune-46680-get.log 9250 Log file, useful mostly for debugging
Tune-46681-get.log 8957 Log file, useful mostly for debugging
Tune-46682-get.log 4630 Log file, useful mostly for debugging
Tune-46683-get.log 3334 Log file, useful mostly for debugging
Tune-46684-get.log 8902 Log file, useful mostly for debugging
Tune-46685-get.log 3512 Log file, useful mostly for debugging
Tune-46687-get.log 4205 Log file, useful mostly for debugging
Tune-46688-get.log 4539 Log file, useful mostly for debugging
Tune-46689-get.log 4359 Log file, useful mostly for debugging
These files should be available for 24 hours.