How To Fix WRF_WSUBST038 - Quantity determination not possible; original material &1, unit &2

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_WSUBST - Article Substitution: Messages Central Determination Logic

• Message number: 038

• Message text: Quantity determination not possible; original material &1, unit &2

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 WRF_WSUBST038 - Quantity determination not possible; original material &1, unit &2 ?

  The SAP error message WRF_WSUBST038 indicates that the system is unable to determine the quantity for a specific material in a given unit of measure. This error typically arises in the context of SAP's Advanced Planning and Optimization (APO) or in the context of materials management and inventory control.
  Causes:
  
  Missing Master Data: The material master data for the specified material may be incomplete or missing. This includes data related to units of measure, conversion factors, or other relevant attributes.
  Incorrect Unit of Measure: The unit of measure specified may not be valid for the material in question. For example, if the material is defined in pieces but the system is trying to process it in kilograms, this could lead to the error.
  Configuration Issues: There may be configuration issues in the system related to how quantities are determined for materials, especially if custom logic or enhancements are involved.
  Stock Availability: The system may not find sufficient stock available in the specified unit of measure, leading to the inability to determine the quantity.
  Data Inconsistencies: There may be inconsistencies in the data, such as discrepancies between the material master and the transaction data.
  
  Solutions:
  
  Check Material Master Data: Verify that the material master data is complete and correctly configured. Ensure that the unit of measure is defined and that conversion factors are set up correctly.
  Validate Unit of Measure: Ensure that the unit of measure being used is valid for the material. You can check this in the material master under the "Units of Measure" view.
  Review Configuration: If there are custom configurations or enhancements, review them to ensure they are functioning as intended. Check the relevant customizing settings in the SAP system.
  Check Stock Levels: Ensure that there is sufficient stock available for the material in the required unit of measure. You can check stock levels using transaction codes like MMBE (Stock Overview).
  Run Consistency Checks: Use SAP tools to run consistency checks on the material and related data to identify any discrepancies that may be causing the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03 (Display Material), MMBE (Stock Overview), and OMU1 (Maintain Units of Measure).
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on resolving this error.
  Documentation: Review SAP documentation related to material management and quantity determination processes for further insights.
  
  If the issue persists after checking these areas, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in materials management or APO.