How To Fix RSSEM056 - Communication error during access to DataSource &1 in System &2

SAP Error Message - Details

• Message type: E = Error

• Message class: RSSEM - Messages for SEM

• Message number: 056

• Message text: Communication error during access to DataSource &1 in System &2

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 RSSEM056 - Communication error during access to DataSource &1 in System &2 ?

  The SAP error message RSSEM056 indicates a communication error when trying to access a DataSource in a specific system. This error typically occurs in the context of SAP BW (Business Warehouse) or SAP BI (Business Intelligence) when there are issues with data extraction from a source system.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP BW system and the source system.
  RFC Connection Problems: The Remote Function Call (RFC) connection to the source system may not be configured correctly or may be down.
  Authorization Issues: The user may not have the necessary authorizations to access the DataSource in the source system.
  DataSource Configuration: The DataSource may not be properly configured or may not exist in the source system.
  System Downtime: The source system may be down for maintenance or other reasons.
  Transport Layer Issues: If the DataSource was recently transported, there may be issues with the transport layer.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the SAP BW system and the source system. You can use tools like ping or traceroute to diagnose network issues.
  Verify RFC Connection: Go to transaction SM59 in the SAP GUI and check the RFC connection settings. Test the connection to ensure it is working correctly.
  Check Authorizations: Ensure that the user has the necessary authorizations to access the DataSource in the source system. You may need to consult with your security team to verify this.
  Validate DataSource Configuration: Check the DataSource configuration in the source system to ensure it is active and correctly set up. You can do this in transaction RSA1 in the BW system.
  Check System Status: Verify if the source system is up and running. If it is down, you may need to wait until it is back online.
  Review Transport Logs: If the DataSource was recently transported, check the transport logs for any errors or issues that may have occurred during the transport process.
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: For checking and configuring RFC connections.
  RSA1: For managing DataSources in SAP BW.
  ST22: For checking dump analysis if there are any related ABAP runtime errors.
  SLG1: For checking application logs that may provide more context on the error.
  
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to the RSSEM056 error.
  
  
  Documentation: Review SAP documentation on data extraction and troubleshooting communication errors for more detailed guidance.
  
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support for further assistance.