pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7456-SellengersRound.ps) >>/Users/jc/w/tmp/Tune-7456-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/England/SellengersRound.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_74565.log 337353 Log file, useful mostly for debugging
Coll_74569.log 282925 Log file, useful mostly for debugging
Find_74560.log 1615 Log file, useful mostly for debugging
Tune-7456-SellengersRound.abc 2056 ABC music file with the extracted tune(s)
Tune-7456-SellengersRound.ps 43259 PostScript
Tune-7456-SellengersRound.txt 2056 Plain-text file with the extracted tune(s)
Tune-7456-get.log 4475 Log file, useful mostly for debugging
These files should be available for 24 hours.