How To Fix WER441 - Type &1 is not compatible with generic type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 441

• Message text: Type &1 is not compatible with generic type &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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WER441 - Type &1 is not compatible with generic type &2 ?

  The SAP error message:
  WER441 Type &1 is not compatible with generic type &2
  typically occurs in the context of ABAP Dictionary or Data Element definitions, especially when dealing with generic data types and their specific subtypes.
  
  Cause
  This error indicates a type incompatibility between a specific data type (&1) and a generic data type (&2) that it is supposed to be compatible with. In SAP, generic types are used to define a broad category of data types (e.g., CHAR, NUMC, INT, etc.), and specific types must conform to the rules of their generic type.
  Common scenarios causing this error:
  
  You are trying to assign or use a data type that does not conform to the expected generic type.
  A data element or domain is defined with a generic type, but the actual type assigned is incompatible.
  In table or structure definitions, a field's data type does not match the generic type expected by the context (e.g., a field expected to be numeric but assigned a character type).
  When using generic data types in ABAP Dictionary or in ABAP code, the specific type must be compatible with the generic type.
  
  
  Solution
  
  
  Check the Data Types:
  
  Identify the specific type (&1) and the generic type (&2) mentioned in the error.
  Verify the definition of the specific type in the ABAP Dictionary (transaction SE11).
  Check the generic type assigned to the data element or domain.
  
  
  
  Ensure Compatibility:
  
  Make sure the specific type is a valid subtype of the generic type.
  For example, if the generic type is CHAR, the specific type must be a character type.
  If the generic type is NUMC (numeric text), the specific type must be numeric text of appropriate length.
  
  
  
  Adjust Data Element or Domain:
  
  If the data element or domain is incorrectly defined, adjust it to match the generic type.
  Alternatively, change the generic type to match the specific type if that is the intended design.
  
  
  
  Check Table or Structure Definitions:
  
  If the error occurs in a table or structure, verify that all fields conform to their expected generic types.
  
  
  
  Use SE11 and SE80:
  
  Use transaction SE11 to inspect data elements, domains, and table structures.
  Use SE80 to check the program or function module where the error occurs.
  
  
  
  Consult SAP Documentation:
  
  Review SAP help or notes related to data types and generic types.
  
  
  
  
  Related Information
  
  
  Generic Data Types in SAP:
  SAP uses generic data types to group similar data types for validation and compatibility checks. Examples include:
  
  CHAR (Character)
  NUMC (Numeric text)
  INT (Integer)
  FLOAT (Floating point)
  DEC (Decimal)
  DATS (Date)
  TIMS (Time)
  
  
  
  ABAP Dictionary:
  The ABAP Dictionary enforces type compatibility rules to ensure data integrity.
  
  
  SAP Notes:
  Sometimes, specific SAP Notes address issues related to data type incompatibilities.
  
  
  Debugging:
  If the error occurs during runtime, use the ABAP debugger to check variable types and assignments.
  
  
  
  Summary
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Specific data type is not compatible with the expected generic data type.
  
  
  Solution
  Verify and correct the data type definitions to ensure compatibility with the generic type.
  
  
  Related
  ABAP Dictionary, Data Elements, Domains, Generic Data Types, SE11, SE80, SAP Notes.
  
  
  
  
  If you provide the exact context (e.g., where the error occurs, code snippet, or object involved), I can help with a more precise solution.