Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book22/EverydaySongBook1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6548-EverydaySongBook1.ps) >>/Users/jc/w/tmp/Tune-6548-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book22/EverydaySongBook1.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_65483.log 272211 Log file, useful mostly for debugging
Sess-65484.log 189740 Log file, useful mostly for debugging
Tune-6548-EverydaySongBook1.abc 156 ABC music file with the extracted tune(s)
Tune-6548-EverydaySongBook1.ps 6 PostScript
Tune-6548-EverydaySongBook1.txt 156 Plain-text file with the extracted tune(s)
Tune-6548-get.log 8583 Log file, useful mostly for debugging
Tune-65480-get.log 301455 Log file, useful mostly for debugging
Tune-65481-get.log 5235 Log file, useful mostly for debugging
Tune-65482-get.log 261725 Log file, useful mostly for debugging
Tune-65483-get.log 5253 Log file, useful mostly for debugging
Tune-65484-get.log 5725 Log file, useful mostly for debugging
Tune-65485-get.log 8899 Log file, useful mostly for debugging
Tune-65486-get.log 5084 Log file, useful mostly for debugging
These files should be available for 24 hours.