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Hi, I'm looking for help with my system which I have upgraded to in the summer. It was my first build and I learnt a huge amount from doing it, but I am definitely still a pc system noob! I bought all new parts for the system to hopefully ensure a trouble free setup, no such luck! The computer randomly crashes and I cannot find a cause or a solution for it! When the computer works it wors very well ans shows no sign of any problems, and then all of a sudden it will freeze, do nothing for a while and then shut down as if the plug has been pulled. Sometimes it will work for 4 or more hours with FSX, other games, movies or CAD working then freeze, other times I don't even get to the windows log on screen before it does it. I have tried a different hard drive, different RAM, and downgraded from windows 7 ultimate to a complete vanilla install of windows 7 professional with no effect. I heard it can be a driver issue but in my device manager everything appears OK. I also heard it could be a conflict between the internal and external GPU so I turned off the onboard GPU and that didn't help. I've also heard that it could be a PSU problem but I would expect it to turn off straight away rather than freeze first, but that comes from almost no experience at all so I could be wrong! My spec is: Intel i5 3570k Ivybridge 3.4Ghz (3.8Ghz with turbo boost on MoBo, also tried turning off, no difference) Gigabyte GA-Z77-D3H MoBo 8GB DDR3 Corsair Vengeance RAM 1TB Western Digital Caviar Black HDD 550W OCZ ZT Series 80 Plus PSU Arctic Cooling Freezer 13 Pro CPU Cooler Windows 7 Professional I'm all out of ideas to try so hopefully the many years of experience on here may come up with a solution. Apologies if this has been posted about before or if it is a simple fix I am unaware of (and this huge essay to read!). Thanks in advance! Stuart

From the Reality XP website I understand using this forum is how to seek technical support: Below is a condensed version of an ongoing going thread I had contributed to on the X-Plane.org forum regarding the UDP network IPv6 message. This should be of great interest to you as I discovered this specific crash issue of X-Plane related to the XP Reality GTN plugin. If at all possible it would be sincerely appreciated to get a support fix for this issue causing X-Plane 11 to crash & stay in memory when changing views creating the UDP network input message which in turn leads folks in the wrong direction when troubleshooting.? I started getting the following message after trying to restart X-Plane 11 after it crashed when I did a view switch from interior to exterior view using the Shift+8 key combination. This started in December (2019) after I had purchased the Reality XP plugin to use with the "vFlyteAir Cherokee 140 Modern" also purchased in December. Thank you kindly. Cheers Thread starts: BE ADVISED Failed to initialize UDP network input. (legacy RECEIVE) This is almost certainly because you are already running another copy of X-Plane on the same computer. Another possibility is that you turned off IPv6 support in your operating system. X-Plane requires at least link-local IPv6 connectivity. Be sure that IPv6 support is on, and restart your computer to be sure that no other instance of X-Plane is running in the background. If it still fails, please check the Log.txt file for entries of type E/NET and W/NET for details. By pressing "I understand" X-Plane closes itself. There is no instance of X-Plane running per the Task Master main page. The only way I can get X-Plane to load correctly thereafter is by a hardboot of the computer. This is a major annoyance to say the least. The next course of action will be to turn off & isolate each "plug-in" one at a time to that I have installed since last November to rule out whether or not the issue is related to a "plug-in". Running on Windows 10 pro platform desktop Version XP11.41r1 Reality XP GTN 750/650 2.5.22.1 Update: Confirmed the issue being generated by the Reality XP GTN plugin for the GTN650/750 (latest version installed 2.5.22.1) when used as a secondary gps. When I switch between interior view to exterior view using the shift+8 key combination X-Plane 11 crashes. When doing a restart the "Failed to initialize UDP network connectivity......." message is generated. After selecting "Understood" X-Plane closes however when looking at Task Manager underneath the "Processes" tab X-Plane is still in memory. I will contact Reality XP support and advise. Thank you to the community for your input and support.