Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1811/CaledonianCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8248-CaledonianCountryDances.ps) >>/Users/jc/w/tmp/Tune-8248-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1811/CaledonianCountryDances.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_82488.log 576622 Log file, useful mostly for debugging
Tune-8248-CaledonianCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-8248-CaledonianCountryDances.ps 6 PostScript
Tune-8248-CaledonianCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-8248-get.log 4337 Log file, useful mostly for debugging
Tune-82480-get.log 4444 Log file, useful mostly for debugging
Tune-82481-get.log 12143 Log file, useful mostly for debugging
Tune-82482-get.log 4384 Log file, useful mostly for debugging
Tune-82485-SkillernChalloner_PCD1.abc 159 ABC music file with the extracted tune(s)
Tune-82485-SkillernChalloner_PCD1.ps 6 PostScript
Tune-82485-SkillernChalloner_PCD1.txt 159 Plain-text file with the extracted tune(s)
Tune-82485-get.log 7682 Log file, useful mostly for debugging
Tune-82487-get.log 8974 Log file, useful mostly for debugging
Tune-82489-get.log 16621 Log file, useful mostly for debugging
These files should be available for 24 hours.