Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/CR/JamesJohnson_ScotsMusicalMuseumV5-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8451-JamesJohnson_ScotsMusicalMuseumV5-V1.ps) >>/Users/jc/w/tmp/Tune-8451-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CR/JamesJohnson_ScotsMusicalMuseumV5-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_84511.log 471008 Log file, useful mostly for debugging
Coll_84513.log 455607 Log file, useful mostly for debugging
Tune-8451-JamesJohnson_ScotsMusicalMuseumV5-V1.abc 171 ABC music file with the extracted tune(s)
Tune-8451-JamesJohnson_ScotsMusicalMuseumV5-V1.ps 6 PostScript
Tune-8451-JamesJohnson_ScotsMusicalMuseumV5-V1.txt 171 Plain-text file with the extracted tune(s)
Tune-8451-get.log 4600 Log file, useful mostly for debugging
Tune-84512-get.log 7338 Log file, useful mostly for debugging
Tune-84512-waltz.abc 172 ABC music file with the extracted tune(s)
Tune-84512-waltz.ps 6 PostScript
Tune-84512-waltz.txt 172 Plain-text file with the extracted tune(s)
Tune-84516-get.log 1395 Log file, useful mostly for debugging
Tune-84519-get.log 2837 Log file, useful mostly for debugging
These files should be available for 24 hours.