Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1769/24CountryDances_1781_Skillern.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5492-24CountryDances_1781_Skillern.ps) >>/Users/jc/w/tmp/Tune-5492-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1769/24CountryDances_1781_Skillern.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-5492-24CountryDances_1781_Skillern.abc 166 ABC music file with the extracted tune(s)
Tune-5492-24CountryDances_1781_Skillern.ps 6 PostScript
Tune-5492-24CountryDances_1781_Skillern.txt 166 Plain-text file with the extracted tune(s)
Tune-5492-Birlin_Braces.abc 1236 ABC music file with the extracted tune(s)
Tune-5492-Birlin_Braces.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-5492-Birlin_Braces.ps 39368 PostScript
Tune-5492-Birlin_Braces.txt 1236 Plain-text file with the extracted tune(s)
Tune-5492-get.log 13156 Log file, useful mostly for debugging
These files should be available for 24 hours.