pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-77639-2344.ps) >>/Users/jc/w/tmp/Tune-77639-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/2344=les_Piadmontese.abc2.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_77639.log 1312228 Log file, useful mostly for debugging
Tune-77639-2344.abc 1707 ABC music file with the extracted tune(s)
Tune-77639-2344.ps 46684 PostScript
Tune-77639-2344.txt 1707 Plain-text file with the extracted tune(s)
Tune-77639-get.log 5023 Log file, useful mostly for debugging
These files should be available for 24 hours.