How To Fix /PLMI/BO_MBOM055 - From Lot Size should not be negative

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMI/BO_MBOM -

• Message number: 055

• Message text: From Lot Size should not be negative

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMI/BO_MBOM055 - From Lot Size should not be negative ?

  The SAP error message /PLMI/BO_MBOM055 with the description "From Lot Size should not be negative" typically occurs in the context of Material Management or Production Planning when dealing with Bill of Materials (BOM) or production orders. This error indicates that there is an issue with the lot size configuration for a material or production order, specifically that a negative value has been entered where it is not allowed.
  Cause:
  
  Negative Lot Size Configuration: The most common cause of this error is that a negative value has been inadvertently entered in the lot size field for a material or production order.
  Master Data Issues: There may be inconsistencies or errors in the material master data or BOM data that lead to this situation.
  User Input Error: A user may have mistakenly entered a negative value during data entry.
  System Configuration: There could be a configuration issue in the system that allows for negative values where they should not be permitted.
  
  Solution:
  
  
  Check Lot Size Values: Review the lot size settings for the relevant material or production order. Ensure that all lot size values are non-negative.
  
  Navigate to the material master (transaction code MM03) and check the lot size settings in the relevant views (e.g., MRP view).
  For production orders, check the order details (transaction code CO03).
  
  
  
  Correct Master Data: If the error is due to incorrect master data, update the material master or BOM to correct the lot size values.
  
  Use transaction codes like CS02 (Change BOM) or MM02 (Change Material) to make necessary adjustments.
  
  
  
  Review Configuration: If the issue persists, review the configuration settings in the system to ensure that negative lot sizes are not allowed.
  
  This may involve checking the configuration in the IMG (Implementation Guide) under the relevant modules (e.g., Production Planning, Material Management).
  
  
  
  User Training: If user input errors are common, consider providing additional training to users on how to correctly enter data in the system.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for more detailed guidance on handling lot sizes and BOM configurations.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  MM03 - Display Material
  CS03 - Display BOM
  CO03 - Display Production Order
  
  
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement the necessary corrections to resolve it.