Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/was/EliasHowe_MusiciansCompanionP1-1842-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3976-EliasHowe_MusiciansCompanionP1-1842-V2.ps) >>/Users/jc/w/tmp/Tune-3976-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/was/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
Coll_39765.log 280117 Log file, useful mostly for debugging
Tune-3976-EliasHowe_MusiciansCompanionP1-1842-V2.abc 174 ABC music file with the extracted tune(s)
Tune-3976-EliasHowe_MusiciansCompanionP1-1842-V2.ps 6 PostScript
Tune-3976-EliasHowe_MusiciansCompanionP1-1842-V2.txt 174 Plain-text file with the extracted tune(s)
Tune-3976-get.log 4642 Log file, useful mostly for debugging
Tune-39761-get.log 4828 Log file, useful mostly for debugging
Tune-39765-get.log 8945 Log file, useful mostly for debugging
These files should be available for 24 hours.