• Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this. But having all questions about FS2020 in one forum becomes a bit messy. So therefore we would like to ask you all to use the following guidelines when posting your questions:

    • Tag FS2020 specific questions with the MSFS2020 tag.
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    By following these guidelines we make sure that the forums remain easy to read for everybody and also that the right people can find your post to answer it.

P3D v4 Question About AFLT3

Hi Don:

I want to do runway lights with AFLT, but i´m a bit lost here, if i understand the manual, i need to use the AFLT (simobjects).exe to do it for P3D4, but can´t open the application. A windows open with the text "unable to establish a connection to via simconnect" if I click OK button, opens a new window with unhandled exception of .NET framework, with a text could not find a part of the path D: xxxxxx\AFLT\XML, and in the root directory where AFLT is installed there is XML file named add on.XML, if I click the continue button, opens another window with 2 buttons; Connect and disconnect clicking in the connect button returns to the first window.

The other AFLT.exe opens with no problem.


1.- Is correct to open the AFLT (simobject).exe for P3D4?
2.- if is yes what is wrong or what i need to do to run AFLT?

Thanks in advance for your time and help.


Windows 7 64b
PhenomX3 3.1 ghz procesor


Resource contributor
1.- Is correct to open the AFLT (simobject).exe for P3D4?
No. Assuming you are using the latest release (3.1.02, if not please upgrade), custom lights are created the same way for all Flightsim versions. Open AFLT3.exe. AFLT3 will create and install the correct library.