How To Fix LRM051 - Constant type &1 not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: LRM - Customizing

• Message number: 051

• Message text: Constant type &1 not allowed

What causes this issue?

Only the fixed values of domain LRM_CONSTANT_TYPE are allowed.

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?

Choose an allowed constant type.

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 LRM051 - Constant type &1 not allowed ?

  The SAP error message LRM051 indicates that a constant type is not allowed in the context where it is being used. This error typically arises in ABAP programming when you are trying to use a constant in a way that is not permitted by the language syntax or the specific context of the code.
  Cause:
  The error can occur due to several reasons:
  
  Incorrect Data Type: You might be trying to use a constant of a type that is not compatible with the expected type in the operation or function.
  Contextual Restrictions: Certain operations or function calls may not allow the use of constants directly, requiring variables instead.
  Syntax Errors: There may be a syntax error in the code that leads to the misinterpretation of the constant type.
  
  Solution:
  To resolve the LRM051 error, consider the following steps:
  
  
  Check Data Types: Ensure that the constant you are using is of the correct data type expected by the operation or function. If necessary, convert the constant to the appropriate type.
  
  
  Use Variables: If the context does not allow constants, try using a variable instead. Assign the constant value to a variable and use that variable in your operation.
  
  
  Review Syntax: Carefully review the syntax of your code. Look for any misplaced commas, parentheses, or other syntax issues that could lead to this error.
  
  
  Consult Documentation: Refer to the SAP documentation or ABAP programming guidelines to understand the specific requirements for the operation you are trying to perform.
  
  
  Debugging: If the error persists, use debugging tools to step through the code and identify the exact line where the error occurs. This can provide more context on why the constant is not allowed.
  
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the different data types in ABAP and their usage.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the LRM051 error and implement a suitable solution.