If at startup you get an error message as the one below with the text
"An unexpected error occured during login and license initialization.&nbsp;
Method not found "Void Microsoft.Extensions.Logging.LoggerFactory.AddProvider(Microsoft.Logging.ILoggerProvider)"
<img src="https://cdn.livechat-files.com/api/file/kb/file/10075403/4c2c6e0035-7f36d79d2ea54b4f979a.png">
The reson is a mismatch between Naviates files and a secondary applications files.&nbsp;
This error is solved in Naviate 2025.3.1 - please download and install from <a rel="noopener noreferrer" href="https://www.Naviate.com/Download" target="_blank">Naviate.com/Download</a>
To solve this issue manually, open the Program Files folder: C:\Program Files\Symetri\Naviate\Civil3D202x&nbsp;
And find the file Microsoft.Extensions.Logging.Abstractions.dll
Rename that file to&nbsp;Microsoft.Extensions.Logging.Abstractions.dll.bak
Then restart your Naviate.

If at startup you get an error message as the one below with the text

"An unexpected error occured during login and license initialization. 

Method not found "Void Microsoft.Extensions.Logging.LoggerFactory.AddProvider(Microsoft.Logging.ILoggerProvider)"



The reson is a mismatch between Naviates files and a secondary applications files. 

This error is solved in Naviate 2025.3.1 - please download and install from

To solve this issue manually, open the Program Files folder: C:\Program Files\Symetri\Naviate\Civil3D202x 

And find the file Microsoft.Extensions.Logging.Abstractions.dll

Rename that file to Microsoft.Extensions.Logging.Abstractions.dll.bak

Then restart your Naviate.

Unexpected error during login

Licence error at start up

Piles-function has stopped working.