Message type: E = Error
Message class:  FI - TR-FM Funds Management 
Message number: 318
Message text: Fin.transaction &1 does not match fin.transaction &2 of top item
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The SAP error message FI318 indicates a mismatch between financial transactions in a document. Specifically, it means that the financial transaction associated with a line item does not match the financial transaction of the top item in the document. This can occur in various scenarios, such as during document posting, invoice verification, or when processing financial transactions.
Cause: Mismatch in Document Items: The line item you are trying to process has a different financial transaction type or amount than what is expected based on the top item. Incorrect Configuration: There may be configuration issues in the financial settings or document types that lead to inconsistencies. Data Entry Errors: Manual entry errors during document creation or posting can lead to mismatched transactions. Incomplete Document: The document may not have been fully processed or may be in an inconsistent state.
Solution: Check Document Items: Review the line items in the document to ensure that they all have the correct
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