Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1769/Glen2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6019-Glen2.ps) >>/Users/jc/w/tmp/Tune-6019-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1769/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
Tune-6019-Glen2.abc 142 ABC music file with the extracted tune(s)
Tune-6019-Glen2.ps 6 PostScript
Tune-6019-Glen2.txt 142 Plain-text file with the extracted tune(s)
Tune-6019-get.log 3961 Log file, useful mostly for debugging
Tune-60192-1799.abc 150 ABC music file with the extracted tune(s)
Tune-60192-1799.ps 6 PostScript
Tune-60192-1799.txt 150 Plain-text file with the extracted tune(s)
Tune-60192-get.log 3881 Log file, useful mostly for debugging
Tune-60196-get.log 73281 Log file, useful mostly for debugging
These files should be available for 24 hours.