Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Kerr_MM/24CountryDances_1796_Preston.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2729-24CountryDances_1796_Preston.ps) >>/Users/jc/w/tmp/Tune-2729-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr_MM/24CountryDances_1796_Preston.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_27295.log 291355 Log file, useful mostly for debugging
Coll_27298.log 578495 Log file, useful mostly for debugging
Tune-2729-24CountryDances_1796_Preston.abc 168 ABC music file with the extracted tune(s)
Tune-2729-24CountryDances_1796_Preston.ps 6 PostScript
Tune-2729-24CountryDances_1796_Preston.txt 168 Plain-text file with the extracted tune(s)
Tune-2729-get.log 4464 Log file, useful mostly for debugging
Tune-27290-get.log 5846 Log file, useful mostly for debugging
Tune-27295-get.log 4905 Log file, useful mostly for debugging
Tune-27296-get.log 4314 Log file, useful mostly for debugging
Tune-27297-get.log 4821 Log file, useful mostly for debugging
These files should be available for 24 hours.