pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7446-MargaretsWaltz.ps) >>/Users/jc/w/tmp/Tune-7446-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/England/MargaretsWaltz.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_74465.log 282925 Log file, useful mostly for debugging
Coll_74467.log 278710 Log file, useful mostly for debugging
Tune-7446-MargaretsWaltz.abc 260 ABC music file with the extracted tune(s)
Tune-7446-MargaretsWaltz.ps 30776 PostScript
Tune-7446-MargaretsWaltz.txt 260 Plain-text file with the extracted tune(s)
Tune-7446-get.log 4406 Log file, useful mostly for debugging
These files should be available for 24 hours.