Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Stewart/Riddell/tmp/Tune-66264-24FavouriteDances_1783_Straight.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9321-Tune-66264-24FavouriteDances_1783_Straight.ps) >>/Users/jc/w/tmp/Tune-9321-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Stewart/Riddell/tmp/Tune-66264-24FavouriteDances_1783_Straight.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-9321-CaledonianCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-9321-CaledonianCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-9321-Tune-66264-24FavouriteDances_1783_Straight.abc 194 ABC music file with the extracted tune(s)
Tune-9321-Tune-66264-24FavouriteDances_1783_Straight.ps 6 PostScript
Tune-9321-Tune-66264-24FavouriteDances_1783_Straight.txt 194 Plain-text file with the extracted tune(s)
Tune-9321-get.log 8234 Log file, useful mostly for debugging
Tune-93210-Hamilton_HUTB2-1846-V1.abc 159 ABC music file with the extracted tune(s)
Tune-93210-Hamilton_HUTB2-1846-V1.txt 159 Plain-text file with the extracted tune(s)
Tune-93210-get.log 7834 Log file, useful mostly for debugging
Tune-93212-get.log 11080 Log file, useful mostly for debugging
Tune-93213-get.log 8900 Log file, useful mostly for debugging
Tune-93215-get.log 4464 Log file, useful mostly for debugging
Tune-93216-get.log 13439 Log file, useful mostly for debugging
Tune-93218-get.log 10708 Log file, useful mostly for debugging
These files should be available for 24 hours.