How To Fix VMP_MSG366 - Reference Designator '&1' already assigned to instance of &2 in BOM &3

VMP_MSG366 - Overview

• Message type: E = Error

• Message class: VMP_MSG - VMP Message Manager

• Message number: 366

• Message text: Reference Designator '&1' already assigned to instance of &2 in BOM &3

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 VMP_MSG366 - Reference Designator '&1' already assigned to instance of &2 in BOM &3 ?

  Certainly! Here's a detailed explanation of the SAP error message:
  
  SAP Error Message:
  VMP_MSG366: Reference Designator '&1' already assigned to instance of &2 in BOM &3
  
  Meaning / 
  Cause:
  This error occurs when you try to assign a Reference Designator (Ref Des) to a component in a Bill of Materials (BOM), but the same Reference Designator is already assigned to another instance of the same component (or another component) within the same BOM.
  
  Reference Designator is a unique identifier used to distinguish individual instances of components in an assembly, especially in engineering and manufacturing contexts (e.g., electronic components on a PCB).
  The system enforces uniqueness of Reference Designators within a BOM to avoid ambiguity.
  The error indicates a duplication conflict: the Ref Des you are trying to assign is already in use.
  
  
  When does it occur?
  
  During BOM creation or change (transaction codes like CS01, CS02).
  When assigning or modifying Reference Designators for components.
  When importing or copying BOMs with Reference