pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9834-NationalGuardsHornpipe.ps) >>/Users/jc/w/tmp/Tune-9834-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ryan-cole/Tunes/NationalGuardsHornpipe.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_98343.log 308219 Log file, useful mostly for debugging
Coll_98346.log 261850 Log file, useful mostly for debugging
Tune-9834-NationalGuardsHornpipe.abc 656 ABC music file with the extracted tune(s)
Tune-9834-NationalGuardsHornpipe.ps 38211 PostScript
Tune-9834-NationalGuardsHornpipe.txt 656 Plain-text file with the extracted tune(s)
Tune-9834-get.log 5527 Log file, useful mostly for debugging
Tune-98342-get.log 13380 Log file, useful mostly for debugging
Tune-98343-get.log 4642 Log file, useful mostly for debugging
These files should be available for 24 hours.