Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1777/Feuillet_Essex_FtFIoD1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8641-Feuillet_Essex_FtFIoD1.ps) >>/Users/jc/w/tmp/Tune-8641-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1777/Feuillet_Essex_FtFIoD1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_86417.log 812 Log file, useful mostly for debugging
Tune-8641-Feuillet_Essex_FtFIoD1.abc 159 ABC music file with the extracted tune(s)
Tune-8641-Feuillet_Essex_FtFIoD1.ps 6 PostScript
Tune-8641-Feuillet_Essex_FtFIoD1.txt 159 Plain-text file with the extracted tune(s)
Tune-8641-get.log 10132 Log file, useful mostly for debugging
Tune-86413-get.log 4298 Log file, useful mostly for debugging
Tune-86414-BotCDaSS.abc 145 ABC music file with the extracted tune(s)
Tune-86414-BotCDaSS.pdf 2217 Portable Data Format
Tune-86414-BotCDaSS.ps 6 PostScript
Tune-86414-BotCDaSS.txt 145 Plain-text file with the extracted tune(s)
Tune-86414-get.log 4828 Log file, useful mostly for debugging
Tune-86417-get.log 3208 Log file, useful mostly for debugging
These files should be available for 24 hours.