Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book42/OriginallyMine.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-32709-OriginallyMine.ps) >>/Users/jc/w/tmp/Tune-32709-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book42/OriginallyMine.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-32709-505_Lady_Margaret_Stewarts_Reel.abc 928 ABC music file with the extracted tune(s)
Tune-32709-505_Lady_Margaret_Stewarts_Reel.pdf 18409 Portable Data Format
Tune-32709-505_Lady_Margaret_Stewarts_Reel.ps 35580 PostScript
Tune-32709-505_Lady_Margaret_Stewarts_Reel.txt 928 Plain-text file with the extracted tune(s)
Tune-32709-OriginallyMine.abc 153 ABC music file with the extracted tune(s)
Tune-32709-OriginallyMine.ps 6 PostScript
Tune-32709-OriginallyMine.txt 153 Plain-text file with the extracted tune(s)
Tune-32709-get.log 15273 Log file, useful mostly for debugging
These files should be available for 24 hours.