pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-58778-BuiltForTwo.ps) >>/Users/jc/w/tmp/Tune-58778-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/Scotland/BuiltForTwo.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-58778-BuiltForTwo.abc 2467 ABC music file with the extracted tune(s)
Tune-58778-BuiltForTwo.ps 54705 PostScript
Tune-58778-BuiltForTwo.txt 2467 Plain-text file with the extracted tune(s)
Tune-58778-get.log 4847 Log file, useful mostly for debugging
These files should be available for 24 hours.