How To Fix APO_BAPI006 - Invalid entry combination. Stock type cannot be uniquely assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: APO_BAPI - Message Class for APO BAPIs

• Message number: 006

• Message text: Invalid entry combination. Stock type cannot be uniquely assigned

What causes this issue?

You have tried to create a stock, but no unique stock type could be
determined based on the specified values. To be able to create a stock
type, you must be able to determine whether it is for example for sales
order stock, project stock, supplier stock etc. If not only supplier
data, but also customer data or project data is available, the system
cannot automatically determine the stock type.
For each of the following values, a maximum of one combination may be
filled:
1. Customer data : &V1&
2. Supplier data : &V2&
3. Sales order data : &V3&
4. Project data : &V4&

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?

Check the data that was used to create the stocks, and avoid
contradictory entries.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message APO_BAPI006 - Invalid entry combination. Stock type cannot be uniquely assigned ?

  The SAP error message APO_BAPI006: Invalid entry combination. Stock type cannot be uniquely assigned typically occurs in the context of Advanced Planning and Optimization (APO) when there is an issue with the stock type assignment in the system. This error indicates that the system cannot determine a unique stock type for the given combination of parameters, which may include plant, storage location, material, and other relevant fields.
  Causes:
  
  Missing or Incorrect Configuration: The stock types may not be properly configured in the system, leading to ambiguity in the assignment.
  Data Inconsistencies: There may be inconsistencies in the master data, such as material master records or storage location data.
  Multiple Stock Types: If multiple stock types are defined for the same combination of parameters, the system cannot determine which one to use.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access certain stock types, leading to this error.
  Custom Logic: If there are custom enhancements or user exits that manipulate stock type assignments, they may introduce errors.
  
  Solutions:
  
  Check Configuration: Review the configuration settings for stock types in the system. Ensure that the stock types are correctly defined and that there are no overlaps or ambiguities.
  Review Master Data: Check the material master and other relevant master data for inconsistencies. Ensure that the stock types are correctly assigned to the materials and that there are no missing entries.
  Analyze the Input Data: Verify the input data being used in the transaction or BAPI call. Ensure that the parameters being passed are correct and correspond to valid stock types.
  Check Authorizations: Ensure that the user has the necessary authorizations to access the stock types involved in the transaction.
  Debug Custom Logic: If there are custom enhancements, debug the logic to identify any issues that may be causing the error.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like MM03 (Display Material), OMI4 (Define Stock Types), or SPRO (Customizing) to check configurations and master data.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Documentation: Review SAP documentation related to stock types and APO to understand the expected configurations and data structures.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP Basis or functional team for further investigation and resolution.