The problem of some players is that Tacview does not record tracks despite proper installation. This was also the case with me, although I had made all the necessary settings correctly. Tacview was displayed in the DCS menu and I had also made all the settings there. The directory for storing the files I have placed several times on other hard drives. Despite all the tips on the Internet, no track was recorded.
The solution was extremely simple.

In the directory

C:\user\yourName\Saved Games\DCS\Scripts

you will find two *.lua files after installing Tacview. One is the Export.lua and the other is the TacviewGameExport.lua.

In my case the Export.lua already existed before the installation of Tacview (installation of SimpleRadio). The problem was that Tacview did not add the necessary entry to this file on its own. I had to add the line of code from the original file from the Tacview installation directory manually. After that the recording worked without any problems.
The line of code is as follows:

local Tacviewlfs=require('lfs');dofile(Tacviewlfs.writedir()..'Scripts/TacviewGameExport.lua')

Just put it in a separate line in Export.lua and the recording should work.

I hope I can help one or the other with this. Good Luck
Greetings Marvball