pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-62712-MasonsCapReel.ps) >>/Users/jc/w/tmp/Tune-62712-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ryan-cole/Tunes/MasonsCapReel.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_62712.log 256233 Log file, useful mostly for debugging
Tune-62712-MasonsCapReel.abc 512 ABC music file with the extracted tune(s)
Tune-62712-MasonsCapReel.ps 38722 PostScript
Tune-62712-MasonsCapReel.txt 512 Plain-text file with the extracted tune(s)
Tune-62712-get.log 4595 Log file, useful mostly for debugging
These files should be available for 24 hours.