How To Fix WER445 - Type &1 is not compatible with predefined types

WER445 - Overview

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 445

• Message text: Type &1 is not compatible with predefined types

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WER445 - Type &1 is not compatible with predefined types ?

  SAP Error Message:
  WER445: Type &1 is not compatible with predefined types
  
  
  Cause:
  This error occurs when a data type used in a program, function module, or data dictionary object does not match or is incompatible with the expected predefined SAP data types. Typically, it happens during type checking or when assigning values between incompatible types, especially in ABAP Dictionary or ABAP code where strict type compatibility is enforced.
  Common scenarios include:
  
  Using a custom-defined type where a standard predefined type is expected.
  Assigning or comparing variables of incompatible types.
  Mismatch between the expected data type in a function module interface and the actual type used.
  Inconsistent or incorrect type declarations in structures, tables, or parameters.
  
  
  
  Solution:
  
  
  Check the Data Type Definition:
  
  Verify the data type &1 (the placeholder in the message will be replaced by the actual type name) in the ABAP Dictionary (SE11).
  Ensure that the type is correctly defined and compatible with the expected predefined SAP types.
  
  
  
  Review the Code