Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/abc2/CaledonianCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-163-CaledonianCountryDances.ps) >>/Users/jc/w/tmp/Tune-163-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/abc2/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_16304.log 367873 Log file, useful mostly for debugging
Coll_16321.log 368964 Log file, useful mostly for debugging
Coll_16334.log 367872 Log file, useful mostly for debugging
Coll_16353.log 367874 Log file, useful mostly for debugging
Coll_16366.log 368965 Log file, useful mostly for debugging
Coll_16397.log 368965 Log file, useful mostly for debugging
Form_16385.log 887 Log file, useful mostly for debugging
Tune-163-CaledonianCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-163-CaledonianCountryDances.ps 6 PostScript
Tune-163-CaledonianCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-163-get.log 4320 Log file, useful mostly for debugging
Tune-1630-get.log 1407 Log file, useful mostly for debugging
Tune-16316-get.log 5663 Log file, useful mostly for debugging
Tune-16317-get.log 5968 Log file, useful mostly for debugging
Tune-16338-get.log 5927 Log file, useful mostly for debugging
Tune-16349-get.log 1503 Log file, useful mostly for debugging
Tune-16358-get.log 4903 Log file, useful mostly for debugging
Tune-1636-get.log 1363 Log file, useful mostly for debugging
Tune-16369-get.log 1361 Log file, useful mostly for debugging
Tune-16379-get.log 6070 Log file, useful mostly for debugging
Tune-16391-get.log 1399 Log file, useful mostly for debugging
Tune-16394-get.log 4399 Log file, useful mostly for debugging
Tune-16398-get.log 1422 Log file, useful mostly for debugging
These files should be available for 24 hours.