pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1517-1785_Cantelo_24AmericanCountryDances.ps) >>/Users/jc/w/tmp/Tune-1517-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/dfty/1785_Cantelo_24AmericanCountryDances.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_15170.log 285735 Log file, useful mostly for debugging
Coll_15175.log 287140 Log file, useful mostly for debugging
Coll_15176.log 700214 Log file, useful mostly for debugging
Tune-1517-1785_Cantelo_24AmericanCountryDances.abc 45228 ABC music file with the extracted tune(s)
Tune-1517-1785_Cantelo_24AmericanCountryDances.ps 344536 PostScript
Tune-1517-1785_Cantelo_24AmericanCountryDances.txt 45228 Plain-text file with the extracted tune(s)
Tune-1517-get.log 29742 Log file, useful mostly for debugging
Tune-15172-get.log 1390 Log file, useful mostly for debugging
Tune-15176-get.log 1390 Log file, useful mostly for debugging
Tune-15177-get.log 5544 Log file, useful mostly for debugging
These files should be available for 24 hours.