pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7754-LadyMaxwellsReel0.ps) >>/Users/jc/w/tmp/Tune-7754-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/LadyMaxwellsReel0.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_77543.log 282925 Log file, useful mostly for debugging
Coll_77546.log 124745 Log file, useful mostly for debugging
Tune-7754-LadyMaxwellsReel0.abc 1245 ABC music file with the extracted tune(s)
Tune-7754-LadyMaxwellsReel0.ps 38417 PostScript
Tune-7754-LadyMaxwellsReel0.txt 1245 Plain-text file with the extracted tune(s)
Tune-7754-get.log 5003 Log file, useful mostly for debugging
Tune-77542-get.log 1274 Log file, useful mostly for debugging
These files should be available for 24 hours.