Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Birm2004/Konsta_Jylha.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-32726-Konsta_Jylha.ps) >>/Users/jc/w/tmp/Tune-32726-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Birm2004/Konsta_Jylha.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-32726-24CountryDances_1810_Button_Whitaker_Elegant.abc 185 ABC music file with the extracted tune(s)
Tune-32726-24CountryDances_1810_Button_Whitaker_Elegant.pdf 2217 Portable Data Format
Tune-32726-24CountryDances_1810_Button_Whitaker_Elegant.ps 6 PostScript
Tune-32726-24CountryDances_1810_Button_Whitaker_Elegant.txt 185 Plain-text file with the extracted tune(s)
Tune-32726-Konsta_Jylha.abc 153 ABC music file with the extracted tune(s)
Tune-32726-Konsta_Jylha.ps 6 PostScript
Tune-32726-Konsta_Jylha.txt 153 Plain-text file with the extracted tune(s)
Tune-32726-get.log 14938 Log file, useful mostly for debugging
These files should be available for 24 hours.