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Troubleshooting: A fatal error occurred. The connection to SQL server cannot be established

When you try to open Microsoft Dynamics NAV Web client, you get the following error:

A fatal error occurred. The connection to SQL server cannot be established or is no longer usable.

There can be various causes of this error. The most common causes are that Microsoft Dynamics NAV Server has stopped or the connection to SQL Server is not configured correctly.

Resolution

This error occurs when Microsoft Dynamics NAV Server cannot connect to SQL Server or to the Dynamics NAV database. To resolve this error, verify that the following conditions are met.

See Also

Deploying the Microsoft Dynamics NAV Web Server Components
Troubleshooting the Microsoft Dynamics NAV Web Client Installation
How to: Install the Web Server Components
Walkthrough: Installing the Microsoft Dynamics NAV Web Server Components on Three Computers