Hello pilots,

Some how I am not able to change any settings on MCDU in the options for units, IRS align time, etc...
If I change units from LBS to KG for example, execute button lights on, but nothing actually happens when I press it. And if I go to other page, I can see immediately on the fuel gauges, that it changes back to LBS. One way I found to keep it in desired selection is to do that on the right side MCDU, but then it needs to stay on the same page entire flight. So it looks like save function is not working properly. Some kind of bug, bad installation or my mistake?
Will be grateful for any advice!

Regards, Viktor.

The changes work fine for me in both P3Dv4 and P3Dv5 (my selections stay what I have selected without having to keep the option page open in the right CDU).

Try reinstalling - install using the "Run as administrator" option, and make sure your AV is off.

Thanks Markoz,

Will try then to reinstall. Just wandering if it will remove all my liveries? At the moment I am based in the place where internet is super slow, so downloading anything takes ages, and I guess I will also need to update it again to latest version, so that's another download...  :-/

Abcdeflijus wrote on Aug 2^nd, 2021 at 3:36am:

Just wandering if it will remove all my liveries?

It will overwrite the aircraft.cfg so that they won't be visible/selectable in the sim, but the texture.xxx files will remain, and so do the downloaded zip files.

To re-add them:
Open the 737 classic ACE, select the model (-300, -400, or -500 in LOCAL mode), then click on ADD, navigate to the P3D\Captain_Sim\737-classic\ace\zip folder select the livery and click on OPEN. This will add it to the aircraft.cfg.
You will need to do this for each livery you have added to the 737 Classic.

Thanks again Markoz,

I did tried to reinstall it, but this still did not helped to solve the problem. Also updated to latest version. However, something is weird with few things on this plane. I am using FSUIP to assign light switches, gear, flaps and etc. But only some of them work. Lets say flaps are always controllable, gear sometimes  works sometimes not, and I can not toggle landing lights at all. I've tried loading then 200 and everything works fine with it. Returning back to 300 and same problem still there. I don't think it's a problem with fsuipc.
With reinstalling liveries was no problems  8-)
I guess I'll just wait until I will have better internet and try reinstall everything from scratch again.