How To Fix UMC128 - MDX: RFC=&1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: UMC - General Messages

• Message number: 128

• Message text: MDX: RFC=&1 &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UMC128 - MDX: RFC=&1 &2 ?

  The SAP error message UMC128 MDX: RFC=&1 &2 typically relates to issues with the MDX (Multidimensional Expressions) queries in the context of SAP BW (Business Warehouse) or SAP HANA environments. This error can occur when there are problems with the Remote Function Call (RFC) connection or when the MDX query cannot be executed properly due to various reasons.
  Causes:
  
  RFC Connection Issues: The error may indicate that there is a problem with the RFC connection to the backend system. This could be due to network issues, incorrect configuration, or the backend system being down.
  MDX Query Errors: The MDX query itself may have syntax errors or may be trying to access data that does not exist or is not available.
  Authorization Issues: The user executing the MDX query may not have the necessary authorizations to access the data or execute the query.
  System Configuration: There may be configuration issues in the SAP BW or HANA system that prevent the MDX query from executing correctly.
  
  Solutions:
  
  
  Check RFC Connection:
  
  Verify the RFC connection settings in the SAP system. Ensure that the connection is active and correctly configured.
  Use transaction SM59 to test the RFC connection and check for any errors.
  
  
  
  Review MDX Query:
  
  Check the MDX query for any syntax errors or logical issues. Ensure that all referenced objects (like cubes, dimensions, etc.) exist and are accessible.
  If possible, run the MDX query in a test environment to isolate the issue.
  
  
  
  User Authorizations:
  
  Ensure that the user executing the MDX query has the necessary authorizations to access the data and execute the query.
  Check the roles and authorizations assigned to the user in transaction PFCG.
  
  
  
  System Logs and Traces:
  
  Check the system logs (transaction SM21) and the application logs (transaction SLG1) for any related error messages that could provide more context on the issue.
  Enable traces for the MDX execution to gather more detailed information about what might be going wrong.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to MDX queries and RFC connections for any specific guidance or known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address specific issues related to UMC128 or MDX queries.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP BW or HANA documentation for best practices on MDX query design and execution.
  
  By following these steps, you should be able to diagnose and resolve the UMC128 MDX: RFC=&1 &2 error in your SAP environment.