Message type: E = Error
Message class:  WOST_WSSO_DLV_MODEL - Messages Order Filfillment/Cancellation 
Message number: 000
Message text: Billing document &1 has been cancelled
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The SAP error message WOST_WSSO_DLV_MODEL000 indicates that a billing document has been cancelled. This error typically arises in scenarios where there is an attempt to process or reference a billing document that is no longer valid due to its cancellation.
Cause: Cancellation of Billing Document: The primary cause of this error is that the billing document referenced (indicated by &1) has been cancelled. This could happen due to various reasons, such as customer returns, billing corrections, or adjustments in the sales process. Data Integrity Issues: There may be inconsistencies in the data, where the system is trying to access a billing document that has been marked as cancelled but is still being referenced in other processes. Incorrect Document Flow: The document flow may not be properly maintained, leading to attempts to process a cancelled document.
Solution: Check Document Status: Verify the status of the billing document in question. You can do this by navigating to the
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