FMS Data Manager Log In issues


I recently purchased a subscription however, I am unable to log-in to the FMS Data Manager application (the others work fine).

I have tired reinstalling it, disabling my firewall, I removed the all special characters from the password, however it is still not working.

Can someone please assist.



Welcome .

Please post a screenshot of any messages you get whilst trying to log in to FMS Data Manager using Guide to posting Screenshots


Hi Ian,

Thank you for your reply, please see attached.


Hi …,

Checking you have indeed entered the correct password,

I suggest a fresh start using exact procedure below :

Please disable any Antivirus and firewall. Uninstall AV if needed.

In FMS Data Manager Settings Unregister Account:

Use Windows to uninstall FMS Data Manager. Specifically:

  1. Press Start and open Apps & Features.
  2. On the right hand side, open Programs and Features.
  3. Find Navigraph FMS Data Manager in the list, select it, and press the Uninstall button above.

If they exist, delete folders:
c:\ProgramData\Navigraph and c:\Program Files (x86)\Navigraph.

Download and install latest FMS Data Manager to the default location.

Please let us know how you get on.


Hi Ian,

I tried your suggestions and it still is not working.


Good day,

Thank you for you assistance in this matter, however it is not working. Additionally, I downloaded and installed NavData Center, and I am receiving an error that there are no simulators detected. I am currently running Xplane 11 (latest version)


The Navigraph Navdata Center if for MSFS and MSFS addons.

Please try Manual FMS Data Downloads


Goodday I hav exactly the same problemms, after installing FMS Data manager login details are wrong.
Details: OS: Windows 11, Simulator MSFS2020. I tried all the solutions, didn’t work.

From te log file: [2023-03-29 14:22:51][6][1] - CInitializer::onUserInitializeFailed [D:\Development\Repositories\Navigraph\fmsdata-manager\NGFMSClient\cinitializer.cpp:115]: {
“error”: “Access token was not found.”

On my Windows11 P3D installation the FMS data manager is running ok with the same navigraph account, on a client PC with W7 again no problemms with the FMS data manager.
FMS Data manager on every computer version

Bert van Halteren

Hi Bert,
please check your time on your PC - this comes normally, when the system time is out of sync


hi! I used Navigraph in the past (2022) and am relearning it since all the changes. I’m also flying mostly the FBW A320. I’m about to begin researching an article for PC Pilot magazine and could use an inside source for questions about integration with charts and flight planning in particular especially with all the changes. Would someone be available for some correspondence?

Thanks Richard. Checked, datamanager now works :grinning:


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