How To Fix /STMC/CR_MSG045 - Error while using SQL connection (&1); system is not available

SAP Error Message - Details

• Message type: E = Error

• Message class: /STMC/CR_MSG -

• 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /STMC/CR_MSG045 - Error while using SQL connection (&1); system is not available ?

  The SAP error message /STMC/CR_MSG045 indicates that there is an issue with the SQL connection to the SAP system, and it states that the system is not available. This error can arise due to various reasons, and here are some common causes, potential solutions, and related information:
  Causes:
  
  Database Connectivity Issues: The database server may be down or unreachable due to network issues.
  Configuration Errors: Incorrect configuration settings in the SAP system or the database connection parameters.
  Database Instance Not Running: The database instance that the SAP system is trying to connect to may not be running.
  Firewall or Security Settings: Firewalls or security settings may be blocking the connection to the database.
  Resource Limitations: The database server may be overloaded or running out of resources (e.g., memory, CPU).
  User Permissions: The user credentials used for the SQL connection may not have the necessary permissions to access the database.
  
  Solutions:
  
  Check Database Status: Ensure that the database server is up and running. You can do this by logging into the database server directly and checking its status.
  Verify Connection Parameters: Review the connection parameters in the SAP system (e.g., hostname, port, database name, user credentials) to ensure they are correct.
  Network Connectivity: Test the network connectivity between the SAP application server and the database server. You can use tools like ping or telnet to check connectivity.
  Review Firewall Settings: Ensure that any firewalls between the SAP system and the database server are configured to allow traffic on the required ports.
  Check User Permissions: Verify that the user account being used for the SQL connection has the necessary permissions to access the database.
  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.
  Restart Services: If necessary, restart the database services or the SAP application server to resolve transient issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes often provide specific guidance for troubleshooting.
  Logs: Review the SAP application logs and database logs for any additional error messages or warnings that could provide more context about the issue.
  Documentation: Refer to the official SAP documentation for your specific version and database type for detailed configuration and troubleshooting steps.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with your SAP Basis team or consult SAP support for further assistance.