pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7265-StanChapmansJ.ps) >>/Users/jc/w/tmp/Tune-7265-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/jig/StanChapmansJ.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_72650.log 609405 Log file, useful mostly for debugging
Coll_72653.log 312430 Log file, useful mostly for debugging
Coll_72658.log 312430 Log file, useful mostly for debugging
Coll_72659.log 621534 Log file, useful mostly for debugging
Tune-7265-StanChapmansJ.abc 1350 ABC music file with the extracted tune(s)
Tune-7265-StanChapmansJ.ps 36349 PostScript
Tune-7265-StanChapmansJ.txt 1350 Plain-text file with the extracted tune(s)
Tune-7265-get.log 5068 Log file, useful mostly for debugging
Tune-72650-get.log 4957 Log file, useful mostly for debugging
These files should be available for 24 hours.