pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8682-Princess_Royal.ps) >>/Users/jc/w/tmp/Tune-8682-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/hornpipe/Princess_Royal.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_86826.log 330695 Log file, useful mostly for debugging
Coll_86827.log 257634 Log file, useful mostly for debugging
Tune-8682-Princess_Royal.abc 554 ABC music file with the extracted tune(s)
Tune-8682-Princess_Royal.ps 36928 PostScript
Tune-8682-Princess_Royal.txt 554 Plain-text file with the extracted tune(s)
Tune-8682-get.log 4513 Log file, useful mostly for debugging
Tune-86829-get.log 1421 Log file, useful mostly for debugging
These files should be available for 24 hours.