Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/jpg/EliasHowe_MusiciansCompanionP2-1843-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1971-EliasHowe_MusiciansCompanionP2-1843-V2.ps) >>/Users/jc/w/tmp/Tune-1971-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/jpg/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_19716.log 410780 Log file, useful mostly for debugging
Tune-1971-EliasHowe_MusiciansCompanionP2-1843-V2.abc 174 ABC music file with the extracted tune(s)
Tune-1971-EliasHowe_MusiciansCompanionP2-1843-V2.ps 6 PostScript
Tune-1971-EliasHowe_MusiciansCompanionP2-1843-V2.txt 174 Plain-text file with the extracted tune(s)
Tune-1971-get.log 4648 Log file, useful mostly for debugging
Tune-19712-get.log 4159 Log file, useful mostly for debugging
Tune-19713-get.log 10193 Log file, useful mostly for debugging
Tune-19717-get.log 4913 Log file, useful mostly for debugging
These files should be available for 24 hours.