How To Fix VMP_MSG373 - Cannot collapse the assembly as it's already planned in another assembly.

SAP Error Message - Details

• Message type: E = Error

• Message class: VMP_MSG - VMP Message Manager

• Message number: 373

• Message text: Cannot collapse the assembly as it's already planned in another assembly.

Self-Explanatory Message

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• What is the cause and solution for SAP error message VMP_MSG373 - Cannot collapse the assembly as it's already planned in another assembly. ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  VMP_MSG373: Cannot collapse the assembly as it's already planned in another assembly.
  
  Cause:
  This error occurs during the BOM (Bill of Materials) explosion or assembly collapsing process in SAP when you try to collapse or explode an assembly that is already planned or included as a component in another assembly. In other words, the system prevents you from collapsing an assembly if it is part of another assembly's BOM structure that is currently planned or processed.
  This typically happens in scenarios such as:
  
  You have a multi-level BOM where a sub-assembly is used in more than one parent assembly.
  The system detects that the assembly you want to collapse is already planned or processed in the context of another assembly.
  Attempting to collapse the assembly independently would cause inconsistencies or duplication in planning.
  
  
  Explanation:
  
  Assembly collapsing means breaking down a multi-level BOM into a single-level BOM by replacing sub-assemblies with their components.
  If an assembly is used in multiple places, collapsing it in one place while it is planned in another can lead to data inconsistencies.
  SAP restricts this to maintain BOM integrity and planning accuracy.
  
  
  Solution:
  To resolve this error, consider the following approaches:
  
  
  Check BOM Usage:
  
  Verify where the assembly is used.
  Use transaction CS15 (Where-used list) to find all parent assemblies that include this assembly.
  
  
  
  Avoid Collapsing Assemblies Used in Multiple BOMs:
  
  If the assembly is used in multiple parent assemblies, avoid collapsing it independently.
  Instead, collapse the entire BOM structure at the top-level assembly.
  
  
  
  Adjust Planning or BOM Structure:
  
  If possible, redesign the BOM so that assemblies are not shared across multiple parents if collapsing is required.
  Alternatively, plan the assemblies separately without collapsing.
  
  
  
  Check Planning Status:
  
  Ensure that the assembly is not locked or already planned in another planning run.
  You may need to complete or delete the existing planning for the assembly before collapsing.
  
  
  
  Use Correct Transaction and Parameters:
  
  When collapsing BOMs, use the appropriate SAP transactions like CS02 (Change BOM) or planning transactions with correct parameters.
  Avoid collapsing sub-assemblies that are referenced elsewhere.
  
  
  
  
  Related Information:
  
  
  Transactions:
  
  CS15 - Where-used list for BOM components.
  CS02 - Change BOM.
  MD04 - Stock/Requirements List to check planning status.
  COHV - Mass processing of production orders.
  
  
  
  SAP Notes:
  
  Check SAP Notes related to BOM explosion and assembly collapsing for your SAP version.
  Sometimes, patches or updates fix related issues.
  
  
  
  BOM Best Practices:
  
  Avoid complex shared sub-assemblies if frequent collapsing is needed.
  Maintain clear BOM hierarchies to simplify planning and explosion.
  
  
  
  
  Summary:
  The error VMP_MSG373 occurs because SAP prevents collapsing an assembly that is already planned in another assembly to avoid inconsistencies. The solution is to review BOM usage, avoid collapsing shared assemblies independently, and ensure proper planning status before collapsing.
  
  If you need help with a specific transaction or scenario, please provide more details!