pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2266-00_Title.ps) >>/Users/jc/w/tmp/Tune-2266-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1770/Longman_Cotillons/00_Title.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_22663.log 274495 Log file, useful mostly for debugging
Coll_22665.log 350365 Log file, useful mostly for debugging
Coll_22666.log 745170 Log file, useful mostly for debugging
Coll_22667.log 936250 Log file, useful mostly for debugging
Tune-2266-00_Title.abc 1362 ABC music file with the extracted tune(s)
Tune-2266-00_Title.ps 33014 PostScript
Tune-2266-00_Title.txt 1362 Plain-text file with the extracted tune(s)
Tune-2266-get.log 4602 Log file, useful mostly for debugging
Tune-22666-get.log 9802 Log file, useful mostly for debugging
These files should be available for 24 hours.