How To Fix /PLMB/BA_RCP855 - Instance &1 could not be established

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMB/BA_RCP -

• Message number: 855

• Message text: Instance &1 could not be established

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?

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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 /PLMB/BA_RCP855 - Instance &1 could not be established ?

  The SAP error message /PLMB/BA_RCP855 Instance &1 could not be established typically indicates an issue with establishing a connection to a specific instance in the SAP system. This error can occur in various contexts, such as when trying to access a backend system, a database, or a specific service.
  Possible Causes:
  
  Network Issues: There may be network connectivity problems between the SAP application and the instance you are trying to connect to.
  Instance Unavailability: The instance you are trying to connect to may be down or not running.
  Configuration Issues: Incorrect configuration settings in the SAP system or the instance itself can lead to connection failures.
  Authorization Issues: The user may not have the necessary permissions to access the instance.
  Resource Limitations: The instance may be overloaded or have reached its resource limits, preventing new connections.
  Firewall or Security Settings: Firewalls or security settings may be blocking the connection to the instance.
  
  Solutions:
  
  Check Instance Status: Verify that the instance you are trying to connect to is up and running. You can do this by checking the instance logs or using monitoring tools.
  Network Connectivity: Ensure that there are no network issues. You can use tools like ping or traceroute to check connectivity to the instance.
  Review Configuration: Check the configuration settings in the SAP system and ensure they are correct. This includes checking the RFC destinations and connection parameters.
  User Permissions: Verify that the user has the necessary authorizations to access the instance. You may need to consult with your SAP security team.
  Resource Monitoring: Monitor the resource usage of the instance to ensure it is not overloaded. If it is, consider scaling resources or optimizing performance.
  Firewall Settings: Check firewall settings to ensure that they are not blocking the connection to the instance. You may need to work with your network/security team to adjust these settings.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  Logs and Traces: Review the application logs and traces for more detailed error messages that can provide insights into the root cause of the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  
  If the problem persists after trying the above solutions, it may be necessary to escalate the issue to your SAP Basis team or SAP support for further investigation.