How To Fix VMP_MSG371 - Cannot load MBOMs for components with negative quantity in target panel.

SAP Error Message - Details

• Message type: E = Error

• Message class: VMP_MSG - VMP Message Manager

• Message number: 371

• Message text: Cannot load MBOMs for components with negative quantity in target panel.

Self-Explanatory Message

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• What is the cause and solution for SAP error message VMP_MSG371 - Cannot load MBOMs for components with negative quantity in target panel. ?

  SAP Error Message:
  
  VMP_MSG371 Cannot load MBOMs for components with negative quantity in target panel.
  
  Cause:
  This error occurs in SAP Variant Configuration (VC) or Manufacturing Process Management (MPM) when the system tries to load Manufacturing Bills of Materials (MBOMs) for components that have a negative quantity in the target panel during the configuration or production process.
  
  Negative quantities in MBOM components are not allowed because they do not make sense in the manufacturing context (you cannot produce a negative amount of a component).
  This situation often arises due to incorrect configuration, master data errors, or inconsistencies in the MBOM or the configuration model.
  It can also happen if the system tries to subtract components or if there is a mismatch between the engineering BOM (EBOM) and MBOM.
  
  
  Solution:
  
  
  Check the MBOM and Configuration Model:
  
  Review the MBOM for the product and verify that no component has a negative quantity.
  Check the configuration model and variant characteristics to ensure that no logic or constraints lead to negative quantities.
  
  
  
  Correct Master Data:
  
  Correct any incorrect quantity entries in the MBOM.
  Ensure that the MBOM is consistent with the EBOM and the configuration.
  
  
  
  Review Variant Configuration Settings:
  
  Check the variant configuration profile and dependencies that might cause negative quantities.
  Adjust constraints or formulas that might result in negative component quantities.
  
  
  
  Use SAP Transactions and Tools:
  
  Use transaction CU50 or CU51 to analyze the configuration model.
  Use CS03 to display BOMs and check component quantities.
  Use C223 to check and maintain MBOMs.
  
  
  
  Debugging and Logs:
  
  If the problem persists, enable debugging or check application logs to identify where the negative quantity is generated.
  Consult SAP Notes related to MBOM and variant configuration errors.
  
  
  
  
  Related Information:
  
  SAP Variant Configuration (VC): MBOMs are generated based on the configuration of the product. Negative quantities are invalid in this context.
  MBOM (Manufacturing BOM): Represents the components and quantities required for manufacturing a product.
  SAP Notes: Search for notes related to VMP_MSG371 or MBOM errors in SAP Support Portal.
  Transactions:
  
  CU50 / CU51 - Configuration model maintenance and analysis.
  CS03 - Display BOM.
  C223 - Maintain MBOM.
  
  
  SAP Help Portal: Documentation on MBOM and variant configuration best practices.
  
  
  Summary:
  The error VMP_MSG371 is caused by the presence of negative component quantities in the MBOM during configuration or production. The solution is to identify and correct these negative quantities in the MBOM or configuration model to ensure all component quantities are zero or positive. This involves checking master data, configuration logic, and BOM consistency.