Message type: E = Error
Message class:  FM_LGD_ZAHLUNGSSICHT -  
Message number: 006
Message text: Open items exist for the posting reference
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The SAP error message FM_LGD_ZAHLUNGSSICHT006, which translates to "Open items exist for the posting reference," typically occurs in the context of financial transactions, particularly when dealing with payment processing or clearing of open items in the SAP system. This error indicates that there are still open items associated with the posting reference you are trying to process, which prevents the transaction from being completed.
Cause: Open Items: The primary cause of this error is that there are one or more open items (e.g., invoices, payments) linked to the posting reference you are trying to process. These open items need to be cleared or settled before you can proceed with the transaction. Incorrect Posting Reference: The posting reference you are using may not be correct or may not correspond to a fully settled transaction. Incomplete Transactions: There may be incomplete or pending transactions that have not been fully processed or cleared.
Solution: Check Open Items: Use transaction
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