Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/reel/band8.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5020-band8.ps) >>/Users/jc/w/tmp/Tune-5020-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/reel/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
Coll_50203.log 156512 Log file, useful mostly for debugging
Tune-5020-band8.abc 142 ABC music file with the extracted tune(s)
Tune-5020-band8.ps 6 PostScript
Tune-5020-band8.txt 142 Plain-text file with the extracted tune(s)
Tune-5020-get.log 8117 Log file, useful mostly for debugging
Tune-50201-24CountryDances_1799_Skillern.abc 165 ABC music file with the extracted tune(s)
Tune-50201-24CountryDances_1799_Skillern.pdf 2217 Portable Data Format
Tune-50201-24CountryDances_1799_Skillern.ps 6 PostScript
Tune-50201-24CountryDances_1799_Skillern.txt 165 Plain-text file with the extracted tune(s)
Tune-50201-get.log 18887 Log file, useful mostly for debugging
Tune-50202-get.log 3086 Log file, useful mostly for debugging
Tune-50204-get.log 5562 Log file, useful mostly for debugging
Tune-50205-get.log 4492 Log file, useful mostly for debugging
Tune-50206-get.log 8412 Log file, useful mostly for debugging
Tune-50208-get.log 3368 Log file, useful mostly for debugging
These files should be available for 24 hours.