How To Fix B1511 - The BAPI must have a RETURN parameter

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 511

• Message text: The BAPI must have a RETURN parameter

What causes this issue?

Each BAPI must have a Return parameter that references the type &v1&,
&v2&, &v3& or &v4&. This parameter does not exist. Generation has been
terminated.

How to fix this error?

Add a Return parameter to the BAPI.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message B1511 - The BAPI must have a RETURN parameter ?

  The SAP error message B1511 indicates that a Business Application Programming Interface (BAPI) you are trying to call does not have a RETURN parameter defined. The RETURN parameter is essential for BAPIs as it is used to return messages, including success or error messages, back to the calling program.
  Cause:
  
  Missing RETURN Parameter: The BAPI you are trying to call does not have a RETURN parameter defined in its interface.
  Incorrect BAPI Usage: You may be using a BAPI that is not designed to return messages or is not implemented correctly.
  Custom BAPI Issues: If you are using a custom BAPI, it may not have been developed with a RETURN parameter.
  
  Solution:
  
  Check BAPI Definition: Verify the BAPI definition in the SAP system. You can do this by using transaction code SE37 (Function Module) or SE80 (Object Navigator) to check the BAPI's interface.
  Add RETURN Parameter: If you are developing a custom BAPI, ensure that you include a RETURN parameter in the BAPI's interface. The RETURN parameter should be of type BAPIRET2 or a similar structure that can hold message information.
  Use Correct BAPI: If you are using a standard BAPI, ensure that you are calling the correct one that is designed for your purpose and has the RETURN parameter.
  Consult Documentation: Review the SAP documentation or help files related to the specific BAPI you are using to understand its expected parameters and usage.
  
  Related Information:
  
  BAPIRET2 Structure: The RETURN parameter typically uses the BAPIRET2 structure, which contains fields for message type, message number, message class, and message text.
  BAPI Naming Conventions: Standard BAPIs usually follow a naming convention that includes the object type and action (e.g., BAPI_SALESORDER_CREATEFROMDAT2).
  Testing BAPIs: You can test BAPIs using transaction code BAPI or SE37 to ensure they work as expected and return the necessary messages.
  
  By ensuring that the BAPI you are using has a RETURN parameter and is correctly implemented, you should be able to resolve the B1511 error.