pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7500-Galloping_Nag-D-12-2.ps) >>/Users/jc/w/tmp/Tune-7500-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/jig/Galloping_Nag-D-12-2.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_75000.log 609405 Log file, useful mostly for debugging
Coll_75007.log 311025 Log file, useful mostly for debugging
Tune-7500-Galloping_Nag-D-12-2.abc 1503 ABC music file with the extracted tune(s)
Tune-7500-Galloping_Nag-D-12-2.ps 34718 PostScript
Tune-7500-Galloping_Nag-D-12-2.txt 1503 Plain-text file with the extracted tune(s)
Tune-7500-get.log 4679 Log file, useful mostly for debugging
These files should be available for 24 hours.