pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-38775-Helena.ps) >>/Users/jc/w/tmp/Tune-38775-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/England/Helena.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-38775-Helena.abc 904 ABC music file with the extracted tune(s)
Tune-38775-Helena.ps 36824 PostScript
Tune-38775-Helena.txt 904 Plain-text file with the extracted tune(s)
Tune-38775-get.log 4231 Log file, useful mostly for debugging
These files should be available for 24 hours.