Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Pioneer/JohnTreat_GftF2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7691-JohnTreat_GftF2.ps) >>/Users/jc/w/tmp/Tune-7691-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Pioneer/JohnTreat_GftF2.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-7691-JohnTreat_GftF2.abc 155 ABC music file with the extracted tune(s)
Tune-7691-JohnTreat_GftF2.ps 6 PostScript
Tune-7691-JohnTreat_GftF2.txt 155 Plain-text file with the extracted tune(s)
Tune-7691-get.log 4187 Log file, useful mostly for debugging
Tune-76914-24CountryDances_1771_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-76914-24CountryDances_1771_Thompson.ps 6 PostScript
Tune-76914-24CountryDances_1771_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-76914-get.log 4515 Log file, useful mostly for debugging
Tune-76915-get.log 4241 Log file, useful mostly for debugging
These files should be available for 24 hours.