pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-45920-KittySharpsChampionJig.ps) >>/Users/jc/w/tmp/Tune-45920-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ryan-cole/Tunes/KittySharpsChampionJig.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_45920.log 341935 Log file, useful mostly for debugging
Tune-45920-KittySharpsChampionJig.abc 1010 ABC music file with the extracted tune(s)
Tune-45920-KittySharpsChampionJig.ps 45857 PostScript
Tune-45920-KittySharpsChampionJig.txt 1010 Plain-text file with the extracted tune(s)
Tune-45920-get.log 4827 Log file, useful mostly for debugging
These files should be available for 24 hours.