Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Kerr_MM/EliasHowe_MusiciansCompanionP1-1842-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2851-EliasHowe_MusiciansCompanionP1-1842-V1.ps) >>/Users/jc/w/tmp/Tune-2851-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr_MM/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_28512.log 292760 Log file, useful mostly for debugging
Coll_28513.log 285735 Log file, useful mostly for debugging
Coll_28518.log 287140 Log file, useful mostly for debugging
Tune-2851-EliasHowe_MusiciansCompanionP1-1842-V1.abc 178 ABC music file with the extracted tune(s)
Tune-2851-EliasHowe_MusiciansCompanionP1-1842-V1.ps 6 PostScript
Tune-2851-EliasHowe_MusiciansCompanionP1-1842-V1.txt 178 Plain-text file with the extracted tune(s)
Tune-2851-get.log 9684 Log file, useful mostly for debugging
Tune-28511-get.log 11543 Log file, useful mostly for debugging
Tune-28514-get.log 1225 Log file, useful mostly for debugging
Tune-28516-get.log 1349 Log file, useful mostly for debugging
Tune-28517-get.log 4378 Log file, useful mostly for debugging
Tune-28519-get.log 4757 Log file, useful mostly for debugging
These files should be available for 24 hours.