Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1758/OldEnglishCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7050-OldEnglishCountryDances.ps) >>/Users/jc/w/tmp/Tune-7050-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1758/OldEnglishCountryDances.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-7050-OldEnglishCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-7050-OldEnglishCountryDances.ps 6 PostScript
Tune-7050-OldEnglishCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-7050-get.log 4337 Log file, useful mostly for debugging
Tune-70500-get.log 4506 Log file, useful mostly for debugging
Tune-70501-get.log 5994 Log file, useful mostly for debugging
Tune-70503-get.log 85414 Log file, useful mostly for debugging
Tune-70504-get.log 9931 Log file, useful mostly for debugging
Tune-70507-get.log 8034 Log file, useful mostly for debugging
Tune-70509-get.log 4750 Log file, useful mostly for debugging
These files should be available for 24 hours.