Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/mazurka/EliasHowe_MusiciansCompanionP3-1844-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8667-EliasHowe_MusiciansCompanionP3-1844-V2.ps) >>/Users/jc/w/tmp/Tune-8667-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/mazurka/EliasHowe_MusiciansCompanionP3-1844-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_8667.log 459811 Log file, useful mostly for debugging
Coll_86670.log 301610 Log file, useful mostly for debugging
Coll_86674.log 482209 Log file, useful mostly for debugging
Coll_86676.log 451410 Log file, useful mostly for debugging
Tune-8667-EliasHowe_MusiciansCompanionP3-1844-V2.abc 178 ABC music file with the extracted tune(s)
Tune-8667-EliasHowe_MusiciansCompanionP3-1844-V2.ps 6 PostScript
Tune-8667-EliasHowe_MusiciansCompanionP3-1844-V2.txt 178 Plain-text file with the extracted tune(s)
Tune-8667-get.log 9374 Log file, useful mostly for debugging
Tune-86673-get.log 4473 Log file, useful mostly for debugging
Tune-86678-get.log 3308 Log file, useful mostly for debugging
These files should be available for 24 hours.