pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12154-252_CharlesStreetBath.ps) >>/Users/jc/w/tmp/Tune-12154-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Pringle/252_CharlesStreetBath.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_12154.log 466809 Log file, useful mostly for debugging
Tune-12154-252_CharlesStreetBath.abc 578 ABC music file with the extracted tune(s)
Tune-12154-252_CharlesStreetBath.ps 34427 PostScript
Tune-12154-252_CharlesStreetBath.txt 578 Plain-text file with the extracted tune(s)
Tune-12154-get.log 14077 Log file, useful mostly for debugging
These files should be available for 24 hours.