How To Fix SO812 - <&> is not defined as a substitute for <&>

SAP Error Message - Details

• Message type: E = Error

• Message class: SO - SAPoffice: message texts

• Message number: 812

• Message text: <&> is not defined as a substitute for <&>

What causes this issue?

There is no substitution between the specified users. The substitution
is not possible.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SO812 - <&> is not defined as a substitute for <&> ?

  The SAP error message SO812 indicates that a specific material or product is not defined as a substitute for another material or product in the system. This error typically arises in scenarios involving sales orders, material management, or when trying to process transactions that involve product substitutions.
  
  Cause:
  
  
  Missing Substitution Definition: The primary cause of this error is that the system does not have a defined substitution relationship between the two materials. This means that the material you are trying to use as a substitute is not set up in the system to replace the original material.
  
  
  
  Configuration Issues: There may be issues with the configuration settings in the material master or the substitution settings in the system.
  
  
  Data Inconsistencies: Sometimes, data inconsistencies or missing entries in the material master records can lead to this error.
  
  
  
  Solution:
  
  
  Define Substitution:
  
  Go to the transaction code OVB1 (or navigate through the SAP menu: Logistics > Sales and Distribution >