pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-51129-LeahsWaltz.ps) >>/Users/jc/w/tmp/Tune-51129-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/england/LeahsWaltz.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-51129-LeahsWaltz.abc 2637 ABC music file with the extracted tune(s)
Tune-51129-LeahsWaltz.ps 39782 PostScript
Tune-51129-LeahsWaltz.txt 2637 Plain-text file with the extracted tune(s)
Tune-51129-get.log 5730 Log file, useful mostly for debugging
These files should be available for 24 hours.