Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MusiciansCompanionP3/24CountryDances_1810_Button_Whitaker_Elegant.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1588-24CountryDances_1810_Button_Whitaker_Elegant.ps) >>/Users/jc/w/tmp/Tune-1588-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MusiciansCompanionP3/24CountryDances_1810_Button_Whitaker_Elegant.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_15880.log 577412 Log file, useful mostly for debugging
Tune-1588-24CountryDances_1810_Button_Whitaker_Elegant.abc 197 ABC music file with the extracted tune(s)
Tune-1588-24CountryDances_1810_Button_Whitaker_Elegant.ps 6 PostScript
Tune-1588-24CountryDances_1810_Button_Whitaker_Elegant.txt 197 Plain-text file with the extracted tune(s)
Tune-1588-get.log 4878 Log file, useful mostly for debugging
Tune-15880-Tune-58634-Straight_Skillern.abc 180 ABC music file with the extracted tune(s)
Tune-15880-Tune-58634-Straight_Skillern.ps 6 PostScript
Tune-15880-Tune-58634-Straight_Skillern.txt 180 Plain-text file with the extracted tune(s)
Tune-15880-get.log 4459 Log file, useful mostly for debugging
Tune-15882-get.log 9763 Log file, useful mostly for debugging
Tune-15883-get.log 8392 Log file, useful mostly for debugging
Tune-15884-get.log 9224 Log file, useful mostly for debugging
Tune-15886-get.log 9103 Log file, useful mostly for debugging
Tune-15887-get.log 19310 Log file, useful mostly for debugging
These files should be available for 24 hours.