pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-71257-WalthamAbbey_PLFD1698_391.ps) >>/Users/jc/w/tmp/Tune-71257-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/WalthamAbbey_PLFD1698_391.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_71257.log 478009 Log file, useful mostly for debugging
Tune-71257-WalthamAbbey_PLFD1698_391.abc 395 ABC music file with the extracted tune(s)
Tune-71257-WalthamAbbey_PLFD1698_391.ps 33743 PostScript
Tune-71257-WalthamAbbey_PLFD1698_391.txt 395 Plain-text file with the extracted tune(s)
Tune-71257-get.log 9243 Log file, useful mostly for debugging
These files should be available for 24 hours.