Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Dales_Selection/newpage.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-57524-newpage.ps) >>/Users/jc/w/tmp/Tune-57524-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Dales_Selection/newpage.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-57524-Gow-CSR1-abc1.abc 152 ABC music file with the extracted tune(s)
Tune-57524-Gow-CSR1-abc1.pdf 2217 Portable Data Format
Tune-57524-Gow-CSR1-abc1.ps 6 PostScript
Tune-57524-Gow-CSR1-abc1.txt 152 Plain-text file with the extracted tune(s)
Tune-57524-get.log 9071 Log file, useful mostly for debugging
Tune-57524-newpage.abc 155 ABC music file with the extracted tune(s)
Tune-57524-newpage.ps 6 PostScript
Tune-57524-newpage.txt 155 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.