Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1750/Glen2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-762-Glen2.ps) >>/Users/jc/w/tmp/Tune-762-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1750/Glen2.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_7620.log 1257710 Log file, useful mostly for debugging
Coll_76225.log 622212 Log file, useful mostly for debugging
Coll_76241.log 859911 Log file, useful mostly for debugging
Coll_76260.log 539331 Log file, useful mostly for debugging
Coll_76291.log 1150071 Log file, useful mostly for debugging
Find_76254.log 1714 Log file, useful mostly for debugging
Find_76273.log 1469 Log file, useful mostly for debugging
Find_76285.log 1719 Log file, useful mostly for debugging
Form_76278.log 925 Log file, useful mostly for debugging
Tune-762-Glen2.abc 142 ABC music file with the extracted tune(s)
Tune-762-Glen2.ps 6 PostScript
Tune-762-Glen2.txt 142 Plain-text file with the extracted tune(s)
Tune-762-get.log 3942 Log file, useful mostly for debugging
Tune-76201-get.log 4308 Log file, useful mostly for debugging
Tune-76205-get.log 5794 Log file, useful mostly for debugging
Tune-76207-get.log 5000 Log file, useful mostly for debugging
Tune-76214-get.log 5006 Log file, useful mostly for debugging
Tune-76218-get.log 4337 Log file, useful mostly for debugging
Tune-76223-get.log 3252 Log file, useful mostly for debugging
Tune-76233-get.log 4388 Log file, useful mostly for debugging
Tune-76240-get.log 1402 Log file, useful mostly for debugging
Tune-76241-get.log 4038 Log file, useful mostly for debugging
Tune-76249-get.log 4903 Log file, useful mostly for debugging
Tune-7625-get.log 4011 Log file, useful mostly for debugging
Tune-76250-get.log 4500 Log file, useful mostly for debugging
Tune-76262-get.log 5070 Log file, useful mostly for debugging
Tune-76286-get.log 5420 Log file, useful mostly for debugging
Tune-76287-get.log 5530 Log file, useful mostly for debugging
Tune-76293-get.log 4267 Log file, useful mostly for debugging
These files should be available for 24 hours.