pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-74138-LuckySeven.ps) >>/Users/jc/w/tmp/Tune-74138-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/england/LuckySeven.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Find_74138.log 1494 Log file, useful mostly for debugging
Tune-74138-LuckySeven.abc 789 ABC music file with the extracted tune(s)
Tune-74138-LuckySeven.ps 38220 PostScript
Tune-74138-LuckySeven.txt 789 Plain-text file with the extracted tune(s)
Tune-74138-get.log 4340 Log file, useful mostly for debugging
These files should be available for 24 hours.