Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1806/EliasHowe_MusiciansCompanionP2-1843-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5459-EliasHowe_MusiciansCompanionP2-1843-V2.ps) >>/Users/jc/w/tmp/Tune-5459-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1806/EliasHowe_MusiciansCompanionP2-1843-V2.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_54590.log 343612 Log file, useful mostly for debugging
Tune-5459-EliasHowe_MusiciansCompanionP2-1843-V2.abc 175 ABC music file with the extracted tune(s)
Tune-5459-EliasHowe_MusiciansCompanionP2-1843-V2.ps 6 PostScript
Tune-5459-EliasHowe_MusiciansCompanionP2-1843-V2.txt 175 Plain-text file with the extracted tune(s)
Tune-5459-get.log 10043 Log file, useful mostly for debugging
Tune-54591-get.log 15198 Log file, useful mostly for debugging
Tune-54593-get.log 5388 Log file, useful mostly for debugging
Tune-54594-get.log 4203 Log file, useful mostly for debugging
Tune-54595-get.log 4012 Log file, useful mostly for debugging
Tune-54596-get.log 8500 Log file, useful mostly for debugging
Tune-54597-get.log 13610 Log file, useful mostly for debugging
Tune-54598-get.log 9444 Log file, useful mostly for debugging
These files should be available for 24 hours.