How To Fix V50R055 - Internal error within BAPI interface: The interface ID is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: V50R - Extended Collective Processing for Delivery Creation

• Message number: 055

• Message text: Internal error within BAPI interface: The interface ID is not unique

What causes this issue?

Internal error in BAPI interface: interface ID not unique.
When creating deliveries for a preceding document from another system,
the request line identification in the <ZH>REQUEST</> segment of the
relevant BAPI interface is not unique.
A value in the REQUEST-ID field must only occur once in the entire
REQUEST table.
This must be ensured by the caller, since this must not be changed in
the BAPI. It must not be changed, because this ID is used to create a
link between the requested delivery item and the error log.

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?

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 V50R055 - Internal error within BAPI interface: The interface ID is not unique ?

  The SAP error message V50R055 indicates that there is an internal error within the BAPI (Business Application Programming Interface) interface, specifically stating that "The interface ID is not unique." This error typically arises when there are multiple BAPI interfaces with the same ID, which can lead to confusion in the system when trying to execute a BAPI call.
  Causes:
  
  Duplicate BAPI Interfaces: The most common cause is that there are multiple BAPI interfaces defined with the same ID in the system.
  
  Configuration Issues: Incorrect configuration or setup of BAPIs in the SAP system can lead to this error.
  Transport Issues: If BAPIs were transported from one system to another (e.g., from development to production), there might be conflicts or duplicates.
  Custom Development: Custom BAPIs created by developers may inadvertently use the same interface ID as standard BAPIs or other custom BAPIs.
  
  Solutions:
  
  
  Check for Duplicates:
  
  Use transaction code SE37 (Function Module) or SE80 (Object Navigator) to search for