How To Fix EL651 - Internal error: Cannot determine first device for meter reading unit &1

SAP Error Message - Details

• Message type: E = Error

• Message class: EL - IS-U meter reading data processing

• Message number: 651

• Message text: Internal error: Cannot determine first device for meter reading unit &1

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message EL651 - Internal error: Cannot determine first device for meter reading unit &1 ?

  The SAP error message EL651, which states "Internal error: Cannot determine first device for meter reading unit &1," typically occurs in the context of the SAP IS-U (Industry Solution for Utilities) module, particularly when dealing with meter reading units and their associated devices.
  Cause:
  The error can arise due to several reasons, including:
  
  Configuration Issues: There may be a misconfiguration in the meter reading unit or its associated devices in the system.
  Missing Data: The system may not have the necessary data to determine the first device for the specified meter reading unit. This could be due to missing or incomplete master data.
  Technical Issues: There could be a bug or internal inconsistency in the SAP system that prevents it from processing the request correctly.
  Authorization Issues: The user may not have the necessary authorizations to access the required data.
  
  Solution:
  To resolve the EL651 error, you can take the following steps:
  
  
  Check Configuration:
  
  Verify the configuration of the meter reading unit in the SAP system. Ensure that it is correctly set up and linked to the appropriate devices.
  Check the settings in transaction codes like EL31 (for meter reading units) and EL30 (for devices).
  
  
  
  Review Master Data:
  
  Ensure that all necessary master data for the meter reading unit and its devices is complete and accurate. This includes checking the device master records and ensuring they are correctly assigned to the meter reading unit.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can analyze the program logic to identify where the error is occurring. This may require the assistance of a technical consultant or developer.
  
  
  
  Check Authorizations:
  
  Ensure that the user encountering the error has the necessary authorizations to access the meter reading unit and its associated devices.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes or patches that may address this specific error. There may be known issues or updates that can resolve the problem.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including the context in which it occurs.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as EL31, EL30, and EL20 for managing meter reading units and devices.
  Documentation: Review SAP documentation related to IS-U and meter reading processes for additional insights and best practices.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and resolve the EL651 error in your SAP system.