pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-41326-1800_Preston.ps) >>/Users/jc/w/tmp/Tune-41326-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1800_Preston.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_41326.log 472409 Log file, useful mostly for debugging
Tune-41326-1800_Preston.abc 19777 ABC music file with the extracted tune(s)
Tune-41326-1800_Preston.ps 129370 PostScript
Tune-41326-1800_Preston.txt 19777 Plain-text file with the extracted tune(s)
Tune-41326-get.log 17162 Log file, useful mostly for debugging
These files should be available for 24 hours.