pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7864-Echo_848-D-32-3.ps) >>/Users/jc/w/tmp/Tune-7864-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/hornpipe/Echo_848-D-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_78640.log 2573920 Log file, useful mostly for debugging
Tune-7864-Echo_848-D-32-3.abc 751 ABC music file with the extracted tune(s)
Tune-7864-Echo_848-D-32-3.ps 38401 PostScript
Tune-7864-Echo_848-D-32-3.txt 751 Plain-text file with the extracted tune(s)
Tune-7864-get.log 4641 Log file, useful mostly for debugging
Tune-78645-get.log 4066 Log file, useful mostly for debugging
Tune-78649-get.log 3316 Log file, useful mostly for debugging
These files should be available for 24 hours.