pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-77820-MissBennetsJig.ps) >>/Users/jc/w/tmp/Tune-77820-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/Scotland/MissBennetsJig.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-77820-MissBennetsJig.abc 1801 ABC music file with the extracted tune(s)
Tune-77820-MissBennetsJig.ps 47929 PostScript
Tune-77820-MissBennetsJig.txt 1801 Plain-text file with the extracted tune(s)
Tune-77820-get.log 4955 Log file, useful mostly for debugging
These files should be available for 24 hours.