Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1777/EverydaySongBook2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2318-EverydaySongBook2.ps) >>/Users/jc/w/tmp/Tune-2318-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1777/EverydaySongBook2.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_23183.log 275011 Log file, useful mostly for debugging
Tune-2318-EverydaySongBook2.abc 154 ABC music file with the extracted tune(s)
Tune-2318-EverydaySongBook2.ps 6 PostScript
Tune-2318-EverydaySongBook2.txt 154 Plain-text file with the extracted tune(s)
Tune-2318-get.log 4211 Log file, useful mostly for debugging
Tune-23181-24AmericanCountryDances_1785_Cantelo.abc 173 ABC music file with the extracted tune(s)
Tune-23181-24AmericanCountryDances_1785_Cantelo.txt 173 Plain-text file with the extracted tune(s)
Tune-23181-get.log 3650 Log file, useful mostly for debugging
Tune-23182-10391_German_Waltz.abc 1492 ABC music file with the extracted tune(s)
Tune-23182-10391_German_Waltz.pdf 29560 Portable Data Format
Tune-23182-10391_German_Waltz.ps 43105 PostScript
Tune-23182-10391_German_Waltz.txt 1492 Plain-text file with the extracted tune(s)
Tune-23182-Playford_COST.abc 149 ABC music file with the extracted tune(s)
Tune-23182-Playford_COST.ps 6 PostScript
Tune-23182-Playford_COST.txt 149 Plain-text file with the extracted tune(s)
Tune-23182-get.log 9738 Log file, useful mostly for debugging
Tune-23184-Gow-CSR-abc1.abc 149 ABC music file with the extracted tune(s)
Tune-23184-Gow-CSR-abc1.ps 6 PostScript
Tune-23184-Gow-CSR-abc1.txt 149 Plain-text file with the extracted tune(s)
Tune-23184-get.log 4033 Log file, useful mostly for debugging
These files should be available for 24 hours.