RobP1

Well, I still had the same issue with an empty Community folder, so that eliminated those 100+ items immediately. It had to be something in the "Official" folder that I purchased through the Marketplace. I moved every folder out of there that didn't start with "asobo-" or "microsoft-", which was only about a dozen items. Looks like the culprit was Enhanced Photogrammetry (Project Coastline) - as soon as I added it back in and attempted to start a flight from the helipad at Sibley Memorial, MSFS froze up before I could even click on the "Ready to Fly" tab! Thanks for responding!

Thank you - I considered doing that, but was hoping for a less time-consuming solution. I have over 100 addons in my Community folder alone, plus whatever Marketplace addons are in the Official folder...the process of testing/elimination will take a long, long time, considering that MSFS takes more than 5 minutes to start up every time! I wish there was some kind of a log file that could show which addon was being loaded at the time of the freeze...

Every time I fly over a certain part of Washington DC, my sim freezes up (graphics and sound are frozen, and the program will no longer respond, but no CTD). The location in question is just north of the Chain Bridge and Sibley Memorial Hospital, near the GTN NDB. The River Visual RWY 19 at DCA requires flying over this area at 1800', so this is very frustrating! I have never had this problem anywhere else in the world so far. When the sim freezes like this, the only way I can exit the program is to end the process in Task Manager. Task Manager shows the application as "Not Responding", with CPU usage around 9% overall (although two of the cores are fluctuating between 80-100%), and memory usage about 7435 MB. I can't seem to figure out what is causing this issue. Like most people, I have a large number of addons, because I don't like most of the default scenery and aircraft. For testing purposes, I deactivated Drzewiecki Designs Washington Landmarks scenery, as well as all of the "I Love VFR" sceneries, power lines, and similar sceneries. After reading posts involving similar issues, I have also tried the following solutions, but none of them have helped: 1) Turned photogrammetry off 2) Reduced Buildings setting to Medium and Low 3) Uninstalled and reinstalled City Update IX 4) Deleted scenery .DAT files and scenery caches I get the same freeze in VR or flatscreen, and it happens every single time I fly into that area. The only time it did not happen was when I started MSFS in Safe Mode (option offered next time I start MSFS after ending the process). Has anyone else experienced this issue? If so, how were you able to solve it? Thanks!

Thanks, everyone! I did the uninstall/reinstall as per the other thread (including deletion of files), and it seems to be working now.

I am having the same problem as described above, except that I have the download version of the NGX (800/900 and 600/700) directly from PMDG. I uninstalled my existing versions from the Control Panel, and reinstalled them using the new SP1d installers that I re-downloaded. The versions now check in Control Panel as 1.00.3219 for the Base Package NGX, and 1.10.6461 for the 600/700 Expansion. Now, when I push the WX button on the EFIS, it brings up range rings - but none of the buttons or knobs on the radar control panel on the pedestal are clickable, and the cursor does not turn into a hand. Please advise. Rob Perez