Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/abc2/Gow-CSR2-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2985-Gow-CSR2-abc2.ps) >>/Users/jc/w/tmp/Tune-2985-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/abc2/Gow-CSR2-abc2.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_29852.log 144741 Log file, useful mostly for debugging
Coll_29858.log 645416 Log file, useful mostly for debugging
Tune-2985-Gow-CSR2-abc2.abc 150 ABC music file with the extracted tune(s)
Tune-2985-Gow-CSR2-abc2.ps 6 PostScript
Tune-2985-Gow-CSR2-abc2.txt 150 Plain-text file with the extracted tune(s)
Tune-2985-get.log 4129 Log file, useful mostly for debugging
Tune-29852-24CountryDances_1782_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-29852-24CountryDances_1782_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-29852-get.log 3528 Log file, useful mostly for debugging
Tune-29856-get.log 4016 Log file, useful mostly for debugging
Tune-29859-get.log 5187 Log file, useful mostly for debugging
These files should be available for 24 hours.