How To Fix UMG291 - Structure reference must be empty for reference type 'D'.

SAP Error Message - Details

• Message type: E = Error

• Message class: UMG - Message Class for the Unicode Migration Tool.

• Message number: 291

• Message text: Structure reference must be empty for reference type 'D'.

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 UMG291 - Structure reference must be empty for reference type 'D'. ?

  The SAP error message UMG291, which states "Structure reference must be empty for reference type 'D'," typically occurs in the context of ABAP programming when dealing with data dictionary objects, particularly when defining or using structures and reference types.
  
  Cause:
  This error usually arises when you are trying to use a reference type (specifically a reference to a structure) in a way that is not allowed. The reference type 'D' indicates that it is a reference to a data object, and the system expects that the structure reference should be empty or not assigned to any specific structure.
  Common Scenarios:
  
  Incorrect Declaration: You may have declared a reference variable for a structure but did not initialize it properly.
  Improper Assignment: You might be trying to assign a non-empty structure reference to a variable that expects an empty reference.
  Data Type Mismatch: There could be a mismatch between the expected data type and the actual data type