How To Fix RSDD_ZA157 - Check for connection of multiple BW systems to BW Accelerator

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD_ZA - Messages from TREX Aggregate Area

• Message number: 157

• Message text: Check for connection of multiple BW systems to BW Accelerator

What causes this issue?

This check identifies how many BW systems are or were connected to the
BW accelerator. Only one BW system can be connected to the BW
accelerator at any given time. However, in some cases, for example, if
no production system is involved, more than one BW system can be
connected to the BW accelerator.
(See https://websmp101.sap-ag.de/~sapidb/011000358700001120232006E#16,,
"Must there be a 1:1 relationship between the BW instance and the BW
Accelerator?")
This check always returns a warning if the system identifies that more
than one BW system is connected.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Delete the data for the BW systems that are to be disconnected from the
BW accelerator, and disconnect all BW systems from the BW accelerator
with the exception of the BW system for which you want to continue to
use for this BW accelerator.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD_ZA157 - Check for connection of multiple BW systems to BW Accelerator ?

  The SAP error message RSDD_ZA157 typically indicates an issue with the connection between multiple SAP BW (Business Warehouse) systems and the BW Accelerator. This error can arise due to various reasons, such as configuration issues, network problems, or system settings.
  Cause:
  
  Configuration Issues: The BW system may not be properly configured to connect to the BW Accelerator. This could involve incorrect settings in the BW system or the BW Accelerator.
  Network Problems: There may be network connectivity issues between the BW system and the BW Accelerator, preventing them from communicating effectively.
  Multiple Connections: If multiple BW systems are trying to connect to the same BW Accelerator, there may be conflicts or limitations in the configuration.
  Authorization Issues: The user or system may not have the necessary authorizations to establish a connection to the BW Accelerator.
  Version Compatibility: There may be compatibility issues between the versions of the BW system and the BW Accelerator.
  
  Solution:
  
  
  Check Configuration: 
  
  Verify the configuration settings in both the BW system and the BW Accelerator. Ensure that the connection parameters (like host, port, etc.) are correctly set.
  Check the settings in transaction RSCONN01 to ensure that the BW Accelerator is correctly defined as a connection.
  
  
  
  Network Connectivity:
  
  Test the network connection between the BW system and the BW Accelerator. You can use tools like ping or telnet to check connectivity.
  Ensure that firewalls or network security settings are not blocking the connection.
  
  
  
  Review Multiple Connections:
  
  If multiple BW systems are connecting to the same BW Accelerator, review the configuration to ensure that it supports multiple connections.
  Check for any limitations or settings that may restrict concurrent connections.
  
  
  
  Authorization Check:
  
  Ensure that the user or system has the necessary authorizations to connect to the BW Accelerator. This may involve checking roles and permissions in the SAP system.
  
  
  
  Version Compatibility:
  
  Verify that the versions of the BW system and the BW Accelerator are compatible. If there are discrepancies, consider upgrading or patching the systems.
  
  
  
  Logs and Traces:
  
  Check the system logs and traces for more detailed error messages that can provide additional context on the issue. Use transaction codes like SLG1 for application logs.
  
  
  
  SAP Notes:
  
  Search for relevant SAP Notes that may address this specific error message. SAP frequently releases updates and patches that can resolve known issues.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for BW and BW Accelerator for detailed configuration guidelines.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the steps you have already taken.
  
  By following these steps, you should be able to diagnose and resolve the RSDD_ZA157 error effectively.