Message type: E = Error
Message class:  FKK_ID_XX_ODN - ODN message 
Message number: 045
Message text: Number range assignment missing for document class &1
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The SAP error message FKK_ID_XX_ODN045 indicates that there is a missing number range assignment for a specific document class in the context of the SAP Convergent Charging or Contract Accounts Receivable and Payable (FI-CA) module. This error typically arises when the system attempts to create a document (like an invoice or payment) but cannot find a valid number range for the specified document class.
Cause: Missing Number Range Assignment: The primary cause of this error is that the number range for the specified document class has not been defined or assigned in the system. Incorrect Configuration: The configuration settings for the document class may not be set up correctly, leading to the system being unable to find a valid number range. Transport Issues: If the configuration was recently transported from another system, the number range assignment may not have been included in the transport request.
Solution: To resolve this error, you can follow these steps: Check Number
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