Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/waifs/Glen2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2235-Glen2.ps) >>/Users/jc/w/tmp/Tune-2235-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/waifs/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_22351.log 404964 Log file, useful mostly for debugging
Coll_22352.log 464011 Log file, useful mostly for debugging
Coll_22354.log 458408 Log file, useful mostly for debugging
Coll_22355.log 258208 Log file, useful mostly for debugging
Coll_22356.log 365166 Log file, useful mostly for debugging
Form_22359.log 960 Log file, useful mostly for debugging
Tune-2235-Glen2.abc 143 ABC music file with the extracted tune(s)
Tune-2235-Glen2.ps 6 PostScript
Tune-2235-Glen2.txt 143 Plain-text file with the extracted tune(s)
Tune-2235-get.log 3967 Log file, useful mostly for debugging
Tune-22352-get.log 6310 Log file, useful mostly for debugging
Tune-22353-get.log 7104 Log file, useful mostly for debugging
Tune-22354-get.log 1272 Log file, useful mostly for debugging
Tune-22355-get.log 3211 Log file, useful mostly for debugging
Tune-22358-get.log 3468 Log file, useful mostly for debugging
These files should be available for 24 hours.