pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8194-Directors-G-32-3.ps) >>/Users/jc/w/tmp/Tune-8194-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/jig/Directors-G-32-3.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_8194.log 587814 Log file, useful mostly for debugging
Coll_81941.log 305405 Log file, useful mostly for debugging
Form_81940.log 880 Log file, useful mostly for debugging
Tune-8194-Directors-G-32-3.abc 584 ABC music file with the extracted tune(s)
Tune-8194-Directors-G-32-3.ps 35446 PostScript
Tune-8194-Directors-G-32-3.txt 584 Plain-text file with the extracted tune(s)
Tune-8194-get.log 4575 Log file, useful mostly for debugging
Tune-81941-get.log 4994 Log file, useful mostly for debugging
These files should be available for 24 hours.