pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-42632-PhysicalSnob.ps) >>/Users/jc/w/tmp/Tune-42632-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/england/PhysicalSnob.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-42632-PhysicalSnob.abc 1206 ABC music file with the extracted tune(s)
Tune-42632-PhysicalSnob.ps 44906 PostScript
Tune-42632-PhysicalSnob.txt 1206 Plain-text file with the extracted tune(s)
Tune-42632-get.log 4420 Log file, useful mostly for debugging
These files should be available for 24 hours.