Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1766/ThomasBraysCountryDances1699.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2939-ThomasBraysCountryDances1699.ps) >>/Users/jc/w/tmp/Tune-2939-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1766/ThomasBraysCountryDances1699.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-2939-ThomasBraysCountryDances1699.abc 165 ABC music file with the extracted tune(s)
Tune-2939-ThomasBraysCountryDances1699.ps 6 PostScript
Tune-2939-ThomasBraysCountryDances1699.txt 165 Plain-text file with the extracted tune(s)
Tune-2939-get.log 4446 Log file, useful mostly for debugging
Tune-29392-get.log 4138 Log file, useful mostly for debugging
Tune-29396-CSGBT_1794-V2.abc 150 ABC music file with the extracted tune(s)
Tune-29396-CSGBT_1794-V2.ps 6 PostScript
Tune-29396-CSGBT_1794-V2.txt 150 Plain-text file with the extracted tune(s)
Tune-29396-get.log 4175 Log file, useful mostly for debugging
Tune-29399-get.log 4364 Log file, useful mostly for debugging
These files should be available for 24 hours.