pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-34844-Shottish12_D_2V.ps) >>/Users/jc/w/tmp/Tune-34844-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/shottish/Shottish12_D_2V.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-34844-Shottish12_D_2V.abc 957 ABC music file with the extracted tune(s)
Tune-34844-Shottish12_D_2V.ps 44799 PostScript
Tune-34844-Shottish12_D_2V.txt 957 Plain-text file with the extracted tune(s)
Tune-34844-get.log 5135 Log file, useful mostly for debugging
These files should be available for 24 hours.