How To Fix AO438 - Lengths of parameters &1 and &2 are different

AO438 - Overview

• Message type: E = Error

• Message class: AO - Appropriation requests - Master data / Customizing

• Message number: 438

• Message text: Lengths of parameters &1 and &2 are different

Self-Explanatory Message

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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 AO438 - Lengths of parameters &1 and &2 are different ?

  The SAP error message AO438, which states "Lengths of parameters &1 and &2 are different," typically occurs in the context of ABAP programming or when dealing with function modules, methods, or data structures where there is a mismatch in the expected lengths of parameters.
  
  Cause:
  This error arises when there is an inconsistency in the length of the parameters being passed to a function module or method. Specifically, it indicates that the length of the actual parameter does not match the length of the formal parameter defined in the function module or method signature. This can happen due to:
  
  Data Type Mismatch: The data types of the parameters do not match, leading to different lengths.
  Incorrect Structure Definition: If you are using structures or tables, the definition of the structure may not match the expected length.
  Implicit Type Conversion: Sometimes, implicit conversions can lead to unexpected lengths.
  Changes in Data Dictionary: If the data dictionary has