pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9778-Rothesay_Rant2-FBb-64-4.ps) >>/Users/jc/w/tmp/Tune-9778-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/jig/Rothesay_Rant2-FBb-64-4.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_97781.log 309620 Log file, useful mostly for debugging
Coll_97784.log 308215 Log file, useful mostly for debugging
Tune-9778-Rothesay_Rant2-FBb-64-4.abc 837 ABC music file with the extracted tune(s)
Tune-9778-Rothesay_Rant2-FBb-64-4.ps 36458 PostScript
Tune-9778-Rothesay_Rant2-FBb-64-4.txt 837 Plain-text file with the extracted tune(s)
Tune-9778-get.log 14405 Log file, useful mostly for debugging
These files should be available for 24 hours.