Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1769/v2tune.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4984-v2tune.ps) >>/Users/jc/w/tmp/Tune-4984-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1769/v2tune.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_49842.log 130549 Log file, useful mostly for debugging
Tune-4984-get.log 3980 Log file, useful mostly for debugging
Tune-4984-v2tune.abc 143 ABC music file with the extracted tune(s)
Tune-4984-v2tune.ps 6 PostScript
Tune-4984-v2tune.txt 143 Plain-text file with the extracted tune(s)
Tune-49845-get.log 4101 Log file, useful mostly for debugging
Tune-49848-2023.abc 1113 ABC music file with the extracted tune(s)
Tune-49848-2023.pdf 27669 Portable Data Format
Tune-49848-2023.ps 39343 PostScript
Tune-49848-2023.txt 1113 Plain-text file with the extracted tune(s)
Tune-49848-get.log 6397 Log file, useful mostly for debugging
These files should be available for 24 hours.