Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/FdML/EliasHowe_MusiciansCompanionP1-1842-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4087-EliasHowe_MusiciansCompanionP1-1842-V2.ps) >>/Users/jc/w/tmp/Tune-4087-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/FdML/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-4087-EliasHowe_MusiciansCompanionP1-1842-V2.abc 175 ABC music file with the extracted tune(s)
Tune-4087-EliasHowe_MusiciansCompanionP1-1842-V2.ps 6 PostScript
Tune-4087-EliasHowe_MusiciansCompanionP1-1842-V2.txt 175 Plain-text file with the extracted tune(s)
Tune-4087-get.log 9929 Log file, useful mostly for debugging
Tune-40870-get.log 10824 Log file, useful mostly for debugging
Tune-40872-get.log 8503 Log file, useful mostly for debugging
Tune-40874-get.log 3902 Log file, useful mostly for debugging
Tune-40875-get.log 4343 Log file, useful mostly for debugging
Tune-40876-get.log 4273 Log file, useful mostly for debugging
Tune-40878-get.log 19251 Log file, useful mostly for debugging
Tune-40879-get.log 11359 Log file, useful mostly for debugging
These files should be available for 24 hours.