How To Fix MC816 - Comparison value &: Specification as constant field name not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 816

• Message text: Comparison value &: Specification as constant field name not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MC816 - Comparison value &: Specification as constant field name not possible ?

  The SAP error message MC816 ("Comparison value &: Specification as constant field name not possible") typically occurs in the context of reporting or data selection in SAP, particularly when working with the Material Management (MM) module or similar areas where data selection criteria are defined.
  Cause:
  This error usually arises when there is an issue with the way a selection criterion is defined in a report or transaction. Specifically, it indicates that a constant field name is being used incorrectly in a comparison operation. This can happen due to:
  
  Incorrect Field Specification: The field specified in the selection criteria is not valid or is not recognized as a constant field.
  Syntax Errors: There may be a syntax error in the way the selection criteria are written.
  Data Type Mismatch: The data type of the field being compared does not match the expected data type for that field.
  Missing or Incorrect Parameters: Required parameters for the selection criteria may be missing or incorrectly defined.
  
  Solution:
  To resolve the MC816 error, you can take the following steps:
  
  
  Check Field Names: Ensure that the field names used in the selection criteria are correct and exist in the database. Verify that you are using the correct technical names for the fields.
  
  
  Review Selection Criteria: Go through the selection criteria in the report or transaction and ensure that they are defined correctly. Look for any syntax errors or misplaced operators.
  
  
  Data Type Verification: Make sure that the data types of the fields being compared are compatible. For example, if you are comparing a numeric field, ensure that the comparison value is also numeric.
  
  
  Use Valid Constants: If you are using constants in your selection criteria, ensure that they are defined correctly and are valid for the field you are working with.
  
  
  Debugging: If you have access to debugging tools, you can step through the code to identify where the error is occurring and what values are being passed.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for the specific transaction or report you are working with to understand the expected input and constraints.
  
  
  Seek Help from SAP Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  
  Related Information:
  
  Transaction Codes: This error may occur in various transaction codes related to reporting, such as MC.9 (Inventory Analysis), MC.1 (Material Consumption), or custom reports.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific transaction or report you are using.
  User Forums: SAP Community and other user forums can be helpful for finding similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the cause of the MC816 error in SAP.