How To Fix ISUDEVCHECK026 - FuMO &: Transfer either OLDKEY or I_TABID, but not both

ISUDEVCHECK026 - Overview

• Message type: E = Error

• Message class: ISUDEVCHECK - IS-U Device Checker: Messages

• Message number: 026

• Message text: FuMO &: Transfer either OLDKEY or I_TABID, but not both

Self-Explanatory Message

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ISUDEVCHECK026 - Details

• The SAP error message ISUDEVCHECK026 indicates that there is an issue with the parameters being passed in a function module or method related to the IS-U (Utilities) module. Specifically, the error message states that you are trying to transfer both OLDKEY and I_TABID, which is not allowed. You can only transfer one of these parameters at a time.
  
  Cause:
  The error occurs when both OLDKEY and I_TABID are being populated in the same call. This typically happens in scenarios where a developer is trying to update or manipulate data in the IS-U module, and the function module or method expects only one of these parameters to be provided to avoid ambiguity.
  
  Solution:
  To resolve this error, you need to ensure that you are only passing one of the two parameters (OLDKEY or I_TABID) in your function call. Here are the steps to troubleshoot and fix the issue:
  
  
  Review the Code: Check the code where the