pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-23535-2209_Lady_Charlotte_Campbell.ps) >>/Users/jc/w/tmp/Tune-23535-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM2/2209_Lady_Charlotte_Campbell.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_23535.log 281520 Log file, useful mostly for debugging
Tune-23535-2209_Lady_Charlotte_Campbell.abc 454 ABC music file with the extracted tune(s)
Tune-23535-2209_Lady_Charlotte_Campbell.ps 34111 PostScript
Tune-23535-2209_Lady_Charlotte_Campbell.txt 454 Plain-text file with the extracted tune(s)
Tune-23535-get.log 4901 Log file, useful mostly for debugging
These files should be available for 24 hours.