JimS wrote on Jan 4^th, 2016 at 4:31am:

David Paul.......I have the same Fatal Error messge you mentioned as I am nearing my arrival airport. I first thought it was my CS727 but I'm not so sure anymore. Can you give me some hints as to what to check? I don't have a big system but it meets or exceeds the min requirements. I never noticed this happening before installing the CS727 but I know have had it happen one time flying the default 737 since installing it. I'm not a computer expert but with clear instructions I can usually follow them pretty well. Thanks for any help you can point me to. Jim

Jim, it was something to do with a combination of Active Sky Next and FSUIPC.  I forget exactly what it was, but it was a conflict between how they interact.  It may have been just needing to make sure FSUIPC was not involved in weather at all so that ASN could do its thing.