Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/_/EliasHowe_MusiciansCompanionP1-1842-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8092-EliasHowe_MusiciansCompanionP1-1842-V1.ps) >>/Users/jc/w/tmp/Tune-8092-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/_/EliasHowe_MusiciansCompanionP1-1842-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
Coll_80922.log 281520 Log file, useful mostly for debugging
Coll_80924.log 284330 Log file, useful mostly for debugging
Coll_80926.log 292760 Log file, useful mostly for debugging
Coll_80929.log 288545 Log file, useful mostly for debugging
Tune-8092-EliasHowe_MusiciansCompanionP1-1842-V1.abc 172 ABC music file with the extracted tune(s)
Tune-8092-EliasHowe_MusiciansCompanionP1-1842-V1.ps 6 PostScript
Tune-8092-EliasHowe_MusiciansCompanionP1-1842-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-8092-get.log 4636 Log file, useful mostly for debugging
Tune-80923-LondonMagazine.abc 148 ABC music file with the extracted tune(s)
Tune-80923-LondonMagazine.ps 6 PostScript
Tune-80923-LondonMagazine.txt 148 Plain-text file with the extracted tune(s)
Tune-80923-get.log 4180 Log file, useful mostly for debugging
Tune-80925-get.log 4003 Log file, useful mostly for debugging
Tune-80928-get.log 4592 Log file, useful mostly for debugging
Tune-80929-get.log 5698 Log file, useful mostly for debugging
These files should be available for 24 hours.