Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1783/Feuillet_Essex_FtFIoD2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1137-Feuillet_Essex_FtFIoD2.ps) >>/Users/jc/w/tmp/Tune-1137-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1783/Feuillet_Essex_FtFIoD2.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_11377.log 396730 Log file, useful mostly for debugging
Tune-1137-Feuillet_Essex_FtFIoD2.abc 159 ABC music file with the extracted tune(s)
Tune-1137-Feuillet_Essex_FtFIoD2.ps 6 PostScript
Tune-1137-Feuillet_Essex_FtFIoD2.txt 159 Plain-text file with the extracted tune(s)
Tune-1137-get.log 4314 Log file, useful mostly for debugging
Tune-11372-get.log 4653 Log file, useful mostly for debugging
Tune-11379-get.log 4610 Log file, useful mostly for debugging
These files should be available for 24 hours.