pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-71373-ChequeredHall.ps) >>/Users/jc/w/tmp/Tune-71373-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/Scotland/ChequeredHall.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-71373-ChequeredHall.abc 2584 ABC music file with the extracted tune(s)
Tune-71373-ChequeredHall.ps 44958 PostScript
Tune-71373-ChequeredHall.txt 2584 Plain-text file with the extracted tune(s)
Tune-71373-get.log 4921 Log file, useful mostly for debugging
These files should be available for 24 hours.