pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7589-Piper_Frap_G.ps) >>/Users/jc/w/tmp/Tune-7589-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/shottish/Piper_Frap_G.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_75894.log 249204 Log file, useful mostly for debugging
Coll_75895.log 521775 Log file, useful mostly for debugging
Tune-7589-Piper_Frap_G.abc 601 ABC music file with the extracted tune(s)
Tune-7589-Piper_Frap_G.ps 37537 PostScript
Tune-7589-Piper_Frap_G.txt 601 Plain-text file with the extracted tune(s)
Tune-7589-get.log 4439 Log file, useful mostly for debugging
Tune-75894-get.log 5559 Log file, useful mostly for debugging
These files should be available for 24 hours.