How To Fix SMT155 - Parameter I_DATA1 and I_DATA2 must have the same type

SAP Error Message - Details

• Message type: E = Error

• Message class: SMT -

• Message number: 155

• Message text: Parameter I_DATA1 and I_DATA2 must have the same type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SMT155 - Parameter I_DATA1 and I_DATA2 must have the same type ?

  The SAP error message SMT155, which states "Parameter I_DATA1 and I_DATA2 must have the same type," typically occurs in the context of ABAP programming when there is a mismatch in the data types of two parameters being passed to a function module or method. This error indicates that the system expects both parameters to be of the same data type, but they are not.
  Cause:
  
  Data Type Mismatch: The most common cause of this error is that the two parameters (I_DATA1 and I_DATA2) are defined with different data types in the function module or method signature.
  Inconsistent Data Structures: If you are passing structures or tables, the fields within those structures or tables may have different types.
  Implicit Type Conversion: Sometimes, implicit type conversion may not occur as expected, leading to this error.
  
  Solution:
  
  Check Parameter Definitions: Review the function module or method definition to ensure that both parameters are defined with the same data type. If they are not, you will need to modify one of them to match the other.
  Data Type Conversion: If the parameters are of different types but logically represent the same data, you can convert one of the parameters to match the type of the other. Use appropriate conversion functions or methods (e.g., CONVERT, CAST, etc.).
  Debugging: Use the ABAP debugger to inspect the values and types of I_DATA1 and I_DATA2 at runtime. This can help you identify where the mismatch is occurring.
  Check Calling Code: Ensure that the code that calls the function module or method is passing the correct types. If you are passing variables, check their definitions.
  Documentation: Refer to the documentation of the function module or method to understand the expected data types for the parameters.
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the various data types in ABAP, such as elementary types (e.g., CHAR, NUMC, INT4, etc.) and complex types (e.g., structures, internal tables).
  Function Module Documentation: Always check the documentation for the function module or method you are using to understand the expected input parameters.
  SAP Notes: If the error persists and seems to be related to a specific SAP version or patch, check SAP Notes for any known issues or fixes related to this error message.
  
  By following these steps, you should be able to resolve the SMT155 error and ensure that the parameters being passed are of the same type.