Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/abc1/slurs.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4415-slurs.ps) >>/Users/jc/w/tmp/Tune-4415-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/abc1/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
Coll_44151.log 420612 Log file, useful mostly for debugging
Coll_44158.log 158477 Log file, useful mostly for debugging
Form_4415.log 870 Log file, useful mostly for debugging
Sess-44150.log 14881 Log file, useful mostly for debugging
Tune-4415-get.log 3959 Log file, useful mostly for debugging
Tune-4415-slurs.abc 142 ABC music file with the extracted tune(s)
Tune-4415-slurs.ps 6 PostScript
Tune-4415-slurs.txt 142 Plain-text file with the extracted tune(s)
Tune-44150-get.log 1335 Log file, useful mostly for debugging
Tune-44152-get.log 9291 Log file, useful mostly for debugging
Tune-44153-get.log 4392 Log file, useful mostly for debugging
Tune-44154-get.log 5804 Log file, useful mostly for debugging
Tune-44155-JamesJohnson_ScotsMusicalMuseumV5-V1.abc 174 ABC music file with the extracted tune(s)
Tune-44155-JamesJohnson_ScotsMusicalMuseumV5-V1.txt 174 Plain-text file with the extracted tune(s)
Tune-44155-get.log 3660 Log file, useful mostly for debugging
Tune-44156-get.log 8406 Log file, useful mostly for debugging
Tune-44157-get.log 4662 Log file, useful mostly for debugging
Tune-44158-get.log 12878 Log file, useful mostly for debugging
These files should be available for 24 hours.