How To Fix WRF_WSUBST065 - Unable to determine unit of issue: subst. mat. &1, DC &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 065

• Message text: Unable to determine unit of issue: subst. mat. &1, DC &2

What causes this issue?

The system was unable to determine a unit of issue for a substitution
material at the issuing distribution center when reading the material
master records (table MARC).
Either the substitution material is not listed at the issuing
distribution center, or a read error has occurred.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

List the substitution material at the issuing distribution center.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_WSUBST065 - Unable to determine unit of issue: subst. mat. &1, DC &2 ?

  The SAP error message WRF_WSUBST065 indicates that the system is unable to determine the unit of issue for a substitution material in a specific distribution center (DC). This error typically arises in the context of materials management and inventory management processes, particularly when dealing with substitution materials in SAP's Advanced Planning and Optimization (APO) or similar modules.
  Cause:
  
  Missing Unit of Measure (UoM): The substitution material may not have a defined unit of measure in the material master data.
  Incorrect Material Master Data: The material master record for the substitution material may be incomplete or incorrectly configured.
  Distribution Center Configuration: The distribution center (DC) may not be properly set up to handle the substitution material.
  Master Data Issues: There may be inconsistencies or missing data in the master data related to the material or the distribution center.
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the material master record for the substitution material (transaction code MM03).
  Ensure that the unit of measure is defined correctly in the Basic Data and Sales views.
  Verify that the material is set up correctly for the relevant plant and distribution center.
  
  
  
  Review Distribution Center Configuration:
  
  Check the configuration of the distribution center to ensure it is set up to handle the substitution material.
  Ensure that the material is assigned to the correct distribution center in the material master.
  
  
  
  Check for Missing Data:
  
  Ensure that all necessary fields in the material master are filled out, including the unit of measure and any relevant purchasing or sales data.
  If the material is a variant or has specific characteristics, ensure that these are correctly defined.
  
  
  
  Consult SAP Notes:
  
  Look for any relevant SAP Notes that may address this specific error message or provide additional guidance on resolving it.
  
  
  
  Testing:
  
  After making the necessary changes, test the process again to see if the error persists.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  MM03 - Display Material
  MM02 - Change Material
  MM01 - Create Material
  
  
  SAP Modules: This error is often encountered in modules related to Materials Management (MM) and Advanced Planning and Optimization (APO).
  Documentation: Refer to SAP Help documentation for detailed information on material master data and unit of measure settings.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in materials management.