Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Tunes/band8.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8089-band8.ps) >>/Users/jc/w/tmp/Tune-8089-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Tunes/band8.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-8089-band8.abc 143 ABC music file with the extracted tune(s)
Tune-8089-band8.ps 6 PostScript
Tune-8089-band8.txt 143 Plain-text file with the extracted tune(s)
Tune-8089-get.log 3969 Log file, useful mostly for debugging
Tune-80890-get.log 1418 Log file, useful mostly for debugging
Tune-80894-1769_Bremner_SRCD.abc 162 ABC music file with the extracted tune(s)
Tune-80894-1769_Bremner_SRCD.ps 6 PostScript
Tune-80894-1769_Bremner_SRCD.txt 162 Plain-text file with the extracted tune(s)
Tune-80894-get.log 5606 Log file, useful mostly for debugging
Tune-80895-24CountryDances_1778_Thompson.abc 173 ABC music file with the extracted tune(s)
Tune-80895-24CountryDances_1778_Thompson.pdf 2217 Portable Data Format
Tune-80895-24CountryDances_1778_Thompson.ps 6 PostScript
Tune-80895-24CountryDances_1778_Thompson.txt 173 Plain-text file with the extracted tune(s)
Tune-80895-get.log 5473 Log file, useful mostly for debugging
Tune-80899-get.log 1407 Log file, useful mostly for debugging
These files should be available for 24 hours.