Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/_/Glen2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5719-Glen2.ps) >>/Users/jc/w/tmp/Tune-5719-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/_/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_5719.log 1193360 Log file, useful mostly for debugging
Coll_57190.log 2294847 Log file, useful mostly for debugging
Coll_57191.log 268875 Log file, useful mostly for debugging
Coll_57193.log 284330 Log file, useful mostly for debugging
Coll_57196.log 282925 Log file, useful mostly for debugging
Tune-5719-Glen2.abc 139 ABC music file with the extracted tune(s)
Tune-5719-Glen2.ps 6 PostScript
Tune-5719-Glen2.txt 139 Plain-text file with the extracted tune(s)
Tune-5719-get.log 3941 Log file, useful mostly for debugging
These files should be available for 24 hours.