Launch of a raw file into CFX pro 4 from Lightroom fails, macOS

Every so often when I use “edit in” from Lightroom for a raw file and select color EFX pro 4, CFX pro 4 launches and then freezes, I have to force quit the program. If I then launch the tif file previously produced by Lightroom into CFX pro it works fine. Anyone know of a fix for this? There are plenty of resources available, both disc and memory at the time of the failure.
Also are there log files for CFX pro and if so where are they?