Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1762/CSRHW-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5414-CSRHW-abc1.ps) >>/Users/jc/w/tmp/Tune-5414-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1762/CSRHW-abc1.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-5414-CSRHW-abc1.abc 147 ABC music file with the extracted tune(s)
Tune-5414-CSRHW-abc1.ps 6 PostScript
Tune-5414-CSRHW-abc1.txt 147 Plain-text file with the extracted tune(s)
Tune-5414-get.log 4060 Log file, useful mostly for debugging
Tune-54143-get.log 4392 Log file, useful mostly for debugging
Tune-54144-get.log 6058 Log file, useful mostly for debugging
Tune-54146-get.log 4504 Log file, useful mostly for debugging
Tune-54149-24CountryDances_1770.abc 157 ABC music file with the extracted tune(s)
Tune-54149-24CountryDances_1770.ps 6 PostScript
Tune-54149-24CountryDances_1770.txt 157 Plain-text file with the extracted tune(s)
Tune-54149-get.log 4205 Log file, useful mostly for debugging
These files should be available for 24 hours.