How To Fix STEP555 - SEL_INSTANCE &1: BOM item: Unit is not defined exactly

SAP Error Message - Details

• Message type: E = Error

• Message class: STEP - ISO 10303 STEP Mapping Messages

• Message number: 555

• Message text: SEL_INSTANCE &1: BOM item: Unit is not defined exactly

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 STEP555 - SEL_INSTANCE &1: BOM item: Unit is not defined exactly ?

  The SAP error message "STEP555 SEL_INSTANCE &1: BOM item: Unit is not defined exactly" typically occurs in the context of Bill of Materials (BOM) processing. This error indicates that there is an issue with the unit of measure (UoM) defined for a BOM item. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Undefined Unit of Measure: The unit of measure for a BOM item is not defined correctly in the system. This could mean that the unit of measure is missing, incorrect, or not properly linked to the material master.
  Inconsistent Data: There may be inconsistencies between the BOM and the material master data, particularly regarding the units of measure.
  Configuration Issues: There could be configuration issues in the system that prevent the proper recognition of units of measure.
  
  Solutions:
  
  
  Check BOM Item Configuration:
  
  Go to the BOM transaction (e.g., CS02) and check the BOM item that is causing the error. Ensure that the unit of measure is defined correctly.
  Verify that the unit of measure is valid and exists in the system.
  
  
  
  Review Material Master Data:
  
  Check the material master data for the BOM components (transaction MM03). Ensure that the unit of measure is defined and that it matches the unit used in the BOM.
  If the unit of measure is missing, you may need to add it in the material master.
  
  
  
  Check UoM Conversion:
  
  If you are using multiple units of measure, ensure that the conversion factors are correctly defined in the material master.
  
  
  
  Recreate BOM:
  
  If the BOM is corrupted or incorrectly configured, consider recreating the BOM item with the correct unit of measure.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for specific guidance on BOM and unit of measure configurations.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  CS01: Create BOM
  CS02: Change BOM
  CS03: Display BOM
  MM01: Create Material Master
  MM02: Change Material Master
  MM03: Display Material Master
  
  
  
  Unit of Measure Configuration:
  
  Ensure that the units of measure are defined in the system (transaction CUNI) and that they are correctly assigned to the relevant materials.
  
  
  
  SAP Notes:
  
  Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  By following these steps, you should be able to identify and resolve the issue related to the "STEP555 SEL_INSTANCE &1: BOM item: Unit is not defined exactly" error message in SAP.