Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/abc2/WilliamShepherdsCollections.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8403-WilliamShepherdsCollections.ps) >>/Users/jc/w/tmp/Tune-8403-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/abc2/WilliamShepherdsCollections.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-8403-24CountryDances_1766_Johnson.abc 165 ABC music file with the extracted tune(s)
Tune-8403-24CountryDances_1766_Johnson.pdf 2217 Portable Data Format
Tune-8403-24CountryDances_1766_Johnson.ps 6 PostScript
Tune-8403-24CountryDances_1766_Johnson.txt 165 Plain-text file with the extracted tune(s)
Tune-8403-WilliamShepherdsCollections.abc 164 ABC music file with the extracted tune(s)
Tune-8403-WilliamShepherdsCollections.ps 6 PostScript
Tune-8403-WilliamShepherdsCollections.txt 164 Plain-text file with the extracted tune(s)
Tune-8403-get.log 9926 Log file, useful mostly for debugging
Tune-84031-get.log 4911 Log file, useful mostly for debugging
Tune-84036-SCD_RoyGoldring_15SocialDances.abc 173 ABC music file with the extracted tune(s)
Tune-84036-SCD_RoyGoldring_15SocialDances.txt 173 Plain-text file with the extracted tune(s)
Tune-84036-get.log 6980 Log file, useful mostly for debugging
Tune-84038-get.log 9709 Log file, useful mostly for debugging
These files should be available for 24 hours.