Software⏱️ 2 min read📅 2026-06-03

How to Fix: A connection was successfully established with the server, but then an error occurred during the login process. (Error Number: 233)

Error 233 occurs when a connection to SQL Server is established but fails during login due to the 'Shared Memory Provider' error.

Quick Answer: Check the SQL Server service status and ensure that the correct credentials are being used for the connection.

The error message 'A connection was successfully established with the server, but then an error occurred during the login process. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.) (.Net SqlClient Data Provider)' typically occurs when the SQL Server service is not running or not configured correctly.

🔍 Why This Happens

  • The Shared Memory Provider is used by the .Net SqlClient Data Provider to establish a connection with SQL Server. If no process is listening on the shared memory pipe, this error occurs.

🔧 Proven Troubleshooting Steps

Method 1: Check SQL Server Service Status

  1. Step 1: Open the Task Manager and check if the SQL Server service is running.

Method 2: Configure SQL Server Service

  1. Step 1: Open the Services console and find the SQL Server service. Right-click on it and select 'Start' or 'Restart' depending on its current status.

🎯 Final Words

By following these steps, you should be able to resolve the 'A connection was successfully established with the server, but then an error occurred during the login process' error and establish a successful connection with your SQL Server instance.

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