Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/jpg/EliasHowe_MusiciansCompanionP1-1842-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6281-EliasHowe_MusiciansCompanionP1-1842-V2.ps) >>/Users/jc/w/tmp/Tune-6281-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/jpg/EliasHowe_MusiciansCompanionP1-1842-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
Tune-6281-EliasHowe_MusiciansCompanionP1-1842-V2.abc 174 ABC music file with the extracted tune(s)
Tune-6281-EliasHowe_MusiciansCompanionP1-1842-V2.ps 6 PostScript
Tune-6281-EliasHowe_MusiciansCompanionP1-1842-V2.txt 174 Plain-text file with the extracted tune(s)
Tune-6281-get.log 4646 Log file, useful mostly for debugging
Tune-62811-get.log 3502 Log file, useful mostly for debugging
Tune-62813-get.log 9801 Log file, useful mostly for debugging
Tune-62814-get.log 8833 Log file, useful mostly for debugging
Tune-62815-get.log 4490 Log file, useful mostly for debugging
Tune-62818-get.log 7605 Log file, useful mostly for debugging
These files should be available for 24 hours.