pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-85139-Skinntroya2_G.ps) >>/Users/jc/w/tmp/Tune-85139-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mazurka/Skinntroya2_G.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_85139.log 323670 Log file, useful mostly for debugging
Tune-85139-Skinntroya2_G.abc 479 ABC music file with the extracted tune(s)
Tune-85139-Skinntroya2_G.ps 34563 PostScript
Tune-85139-Skinntroya2_G.txt 479 Plain-text file with the extracted tune(s)
Tune-85139-get.log 4521 Log file, useful mostly for debugging
These files should be available for 24 hours.