pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-31536-Vallafield-C-32-2.ps) >>/Users/jc/w/tmp/Tune-31536-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/jig/Vallafield-C-32-2.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_31536.log 309620 Log file, useful mostly for debugging
Find_31536.log 1558 Log file, useful mostly for debugging
Tune-31536-Vallafield-C-32-2.abc 819 ABC music file with the extracted tune(s)
Tune-31536-Vallafield-C-32-2.ps 33495 PostScript
Tune-31536-Vallafield-C-32-2.txt 819 Plain-text file with the extracted tune(s)
Tune-31536-get.log 4625 Log file, useful mostly for debugging
These files should be available for 24 hours.