pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9650-Keel_Row_G.ps) >>/Users/jc/w/tmp/Tune-9650-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/hornpipe/Keel_Row_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_96502.log 275899 Log file, useful mostly for debugging
Coll_96505.log 289952 Log file, useful mostly for debugging
Coll_96506.log 786439 Log file, useful mostly for debugging
Coll_96509.log 344745 Log file, useful mostly for debugging
Tune-9650-Keel_Row_G.abc 375 ABC music file with the extracted tune(s)
Tune-9650-Keel_Row_G.ps 34180 PostScript
Tune-9650-Keel_Row_G.txt 375 Plain-text file with the extracted tune(s)
Tune-9650-get.log 4407 Log file, useful mostly for debugging
Tune-96508-get.log 3116 Log file, useful mostly for debugging
These files should be available for 24 hours.