pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-76141-3303_the_Short_Apron.ps) >>/Users/jc/w/tmp/Tune-76141-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR12/3303_the_Short_Apron.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-76141-3303_the_Short_Apron.abc 733 ABC music file with the extracted tune(s)
Tune-76141-3303_the_Short_Apron.ps 36633 PostScript
Tune-76141-3303_the_Short_Apron.txt 733 Plain-text file with the extracted tune(s)
Tune-76141-get.log 4713 Log file, useful mostly for debugging
These files should be available for 24 hours.