# FMC640 - Teltonika application require .NET

**URL:** <https://community.teltonika.lt/t/fmc640-teltonika-application-require-net/21576>\
**Category:** Issue\
**Created:** [October 16, 2026, 11:46am UTC](https://community.teltonika.lt/t/fmc640-teltonika-application-require-net/21576 "2026-10-16T11:46:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Steelskin](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/s/b9e5f3/32.png) [@Steelskin](https://community.teltonika.lt/u/Steelskin)\
**Post date:** [October 16, 2026, 11:46am UTC](https://community.teltonika.lt/t/fmc640-teltonika-application-require-net/21576/1 "2026-10-16T11:46:23Z")

</div>

Hello,

For a profesionnal use, I’m using Teltonika FMC640 in several of our vehicule (trains).

On my computer, I try to run “[Teltonika.Configurator\_1.7.64\_B.FM64\_R.88.exe](https://wiki.teltonika-gps.com/view/Teltonika_Configurator_versions)” but this pop-up appears:

 ![image](https://community.teltonika.lt/uploads/default/original/3X/1/1/11008404ed666ec20f349b8cd51e482bffb8bf38.png)

After cliking on “Oui”, nothing happens.

So I install [SDK 10.0.402](https://dotnet.microsoft.com/en-us/download/dotnet/10.0) and also .NET Framework 4.8.1

After that, nothing change.

I tried to reboot my computer, to run the .exe in admin mode.

I tried this on a computer with Windows 11 Entreprise processor x64 and on a computer with Windows 10 Entreprise 2016 LTSB.

Which exact version of .NET do I need to run the configurator properly ?

Thanks in advance for your help 🙂