How To Fix DBOSC045 - Error while using SQL connection (&1); system is not available

SAP Error Message - Details

• Message type: E = Error

• Message class: DBOSC -

• Message number: 045

• Message text: Error while using SQL connection (&1); system is not available

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DBOSC045 - Error while using SQL connection (&1); system is not available ?

  The SAP error message DBOSC045 indicates that there is an issue with the SQL connection to the database, and the system is not available. This error can arise from various causes, and here are some common reasons, potential solutions, and related information:
  Causes:
  
  Database Server Down: The database server may be down or not reachable due to network issues or maintenance.
  Configuration Issues: Incorrect database connection parameters in the SAP system configuration (e.g., incorrect hostname, port, or database name).
  Database Instance Not Running: The specific database instance that SAP is trying to connect to may not be running.
  Firewall Issues: Firewalls or security groups may be blocking the connection to the database server.
  Resource Limitations: The database server may be experiencing resource limitations (e.g., memory, CPU) that prevent it from accepting new connections.
  User Authentication Issues: The user credentials used for the connection may be incorrect or the user may not have the necessary permissions.
  
  Solutions:
  
  Check Database Status: Verify that the database server is up and running. You can do this by trying to connect to the database using a database client or checking the server status.
  Review Connection Parameters: Check the connection parameters in the SAP system (e.g., via transaction DBACOCKPIT or RZ10) to ensure they are correct.
  Restart Database Instance: If the database instance is down, restart it and check if the issue persists.
  Network Connectivity: Ensure that there are no network issues preventing the SAP system from reaching the database server. You can use tools like ping or telnet to test connectivity.
  Check Firewall Settings: Review firewall settings to ensure that the necessary ports for database connections are open.
  Monitor Resource Usage: Check the resource usage on the database server to ensure it is not overloaded. If it is, consider optimizing queries or increasing resources.
  Validate User Credentials: Ensure that the user credentials used for the connection are correct and that the user has the necessary permissions to access the database.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. You can search the SAP Support Portal for relevant notes.
  Database Logs: Review the database logs for any error messages or warnings that could provide more context about the connection issue.
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  By following these steps, you should be able to diagnose and resolve the DBOSC045 error in your SAP system.