pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1590-24FavouriteDances_1783_Straight.ps) >>/Users/jc/w/tmp/Tune-1590-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/24FavouriteDances_1783_Straight.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_1590.log 315243 Log file, useful mostly for debugging
Coll_15901.log 725500 Log file, useful mostly for debugging
Coll_15904.log 597645 Log file, useful mostly for debugging
Coll_15908.log 295569 Log file, useful mostly for debugging
Tune-1590-24FavouriteDances_1783_Straight.abc 19182 ABC music file with the extracted tune(s)
Tune-1590-24FavouriteDances_1783_Straight.ps 128007 PostScript
Tune-1590-24FavouriteDances_1783_Straight.txt 19182 Plain-text file with the extracted tune(s)
Tune-1590-get.log 18867 Log file, useful mostly for debugging
Tune-15901-get.log 10894 Log file, useful mostly for debugging
Tune-15902-get.log 4126 Log file, useful mostly for debugging
Tune-15904-get.log 5453 Log file, useful mostly for debugging
Tune-15906-get.log 13651 Log file, useful mostly for debugging
These files should be available for 24 hours.