Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Tweed2/slurs.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1955-slurs.ps) >>/Users/jc/w/tmp/Tune-1955-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Tweed2/slurs.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-1955-get.log 3973 Log file, useful mostly for debugging
Tune-1955-slurs.abc 144 ABC music file with the extracted tune(s)
Tune-1955-slurs.ps 6 PostScript
Tune-1955-slurs.txt 144 Plain-text file with the extracted tune(s)
Tune-19550-get.log 3524 Log file, useful mostly for debugging
Tune-19551-get.log 5367 Log file, useful mostly for debugging
Tune-19552-get.log 5930 Log file, useful mostly for debugging
Tune-19553-get.log 3424 Log file, useful mostly for debugging
Tune-19554-EliasHowe_MusiciansCompanionP2-1843-V2.abc 180 ABC music file with the extracted tune(s)
Tune-19554-EliasHowe_MusiciansCompanionP2-1843-V2.ps 6 PostScript
Tune-19554-EliasHowe_MusiciansCompanionP2-1843-V2.txt 180 Plain-text file with the extracted tune(s)
Tune-19554-get.log 4613 Log file, useful mostly for debugging
Tune-19555-get.log 5003 Log file, useful mostly for debugging
Tune-19557-get.log 7758 Log file, useful mostly for debugging
Tune-19559-get.log 4449 Log file, useful mostly for debugging
These files should be available for 24 hours.