Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MM2/EliasHowe_MusiciansCompanionP3-1844-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5924-EliasHowe_MusiciansCompanionP3-1844-V1.ps) >>/Users/jc/w/tmp/Tune-5924-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MM2/EliasHowe_MusiciansCompanionP3-1844-V1.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-5924-EliasHowe_MusiciansCompanionP3-1844-V1.abc 174 ABC music file with the extracted tune(s)
Tune-5924-EliasHowe_MusiciansCompanionP3-1844-V1.ps 6 PostScript
Tune-5924-EliasHowe_MusiciansCompanionP3-1844-V1.txt 174 Plain-text file with the extracted tune(s)
Tune-5924-get.log 11552 Log file, useful mostly for debugging
Tune-59241-get.log 15365 Log file, useful mostly for debugging
Tune-59242-get.log 3860 Log file, useful mostly for debugging
Tune-59244-get.log 4650 Log file, useful mostly for debugging
Tune-59246-get.log 3266 Log file, useful mostly for debugging
Tune-59247-get.log 4581 Log file, useful mostly for debugging
Tune-59248-get.log 7406 Log file, useful mostly for debugging
Tune-59249-24CountryDances_1801_Preston.abc 164 ABC music file with the extracted tune(s)
Tune-59249-24CountryDances_1801_Preston.txt 164 Plain-text file with the extracted tune(s)
Tune-59249-get.log 12049 Log file, useful mostly for debugging
These files should be available for 24 hours.