Message type: E = Error
Message class:  FKKINV - Invoicing in Contract Accounts Receivable and Payable 
Message number: 803
Message text: External run reference entered. Entered extract IDs will be ignored
For the additional selection conditions on extract level, you have
filled the parameter for the extract ID as well as for the run reference
of an extract.
The selection of the imported invoicing documents ignore the extract
ID(s) you entered and determines the correct extract ID(s) suitable for
the specified run reference.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FKKINV803 indicates that there is an issue with the external run reference in the context of the contract accounts receivable and payable (FI-CA) module. This error typically occurs when you are trying to process an invoice or an external run that has been incorrectly configured or when the system is unable to recognize the extract IDs provided.
Cause: Incorrect External Run Reference: The external run reference you entered does not match the expected format or is not recognized by the system. Invalid Extract IDs: The extract IDs you provided may not be valid or may not correspond to the expected data in the system.
Configuration Issues: There may be configuration issues in the FI-CA module that prevent the system from processing the external run correctly. Data Consistency Issues: There may be inconsistencies in the data that are causing the system to ignore the extract IDs.
Solution: Check External Run Reference: Ensure that the
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