pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2500-Scotchman_In_America_G.ps) >>/Users/jc/w/tmp/Tune-2500-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/shottish/Scotchman_In_America_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_2500.log 285734 Log file, useful mostly for debugging
Coll_25001.log 301189 Log file, useful mostly for debugging
Coll_25003.log 417805 Log file, useful mostly for debugging
Coll_25006.log 433260 Log file, useful mostly for debugging
Tune-2500-Scotchman_In_America_G.abc 710 ABC music file with the extracted tune(s)
Tune-2500-Scotchman_In_America_G.ps 38836 PostScript
Tune-2500-Scotchman_In_America_G.txt 710 Plain-text file with the extracted tune(s)
Tune-2500-get.log 4725 Log file, useful mostly for debugging
Tune-25002-get.log 8041 Log file, useful mostly for debugging
These files should be available for 24 hours.