pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-50400-MichaelDabney_12Minuets12Dances-1760-V2.ps) >>/Users/jc/w/tmp/Tune-50400-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MichaelDabney_12Minuets12Dances-1760-V2.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-50400-MichaelDabney_12Minuets12Dances-1760-V2.abc 25701 ABC music file with the extracted tune(s)
Tune-50400-MichaelDabney_12Minuets12Dances-1760-V2.ps 168946 PostScript
Tune-50400-MichaelDabney_12Minuets12Dances-1760-V2.txt 25701 Plain-text file with the extracted tune(s)
Tune-50400-get.log 20321 Log file, useful mostly for debugging
These files should be available for 24 hours.