Message type: E = Error
Message class:  FKKBIX_BIP -  
Message number: 147
Message text: Billing cycle &1 start date is outside the validity period of item &2.
The start date &v3& of the billing cycle &v1& in item &v2& is outside
the validity period of the billing plan item.
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 FKKBIX_BIP147 indicates that there is an issue with the billing cycle start date in relation to the validity period of a specific item. This error typically occurs in the context of billing and invoicing processes within SAP, particularly in modules like SAP Convergent Charging or SAP Contract Accounts Receivable and Payable (FI-CA).
Cause: The error arises when the billing cycle's start date is set outside the validity period of the item being billed. This can happen due to several reasons: Incorrect Billing Cycle Dates: The billing cycle start date may have been incorrectly configured or entered. Item Validity Period: The item may have a defined validity period that does not encompass the billing cycle start date. Changes in Item Configuration: If the item’s validity period was changed after the billing cycle was set, it could lead to this error. Data Entry Errors: Manual data entry errors can also lead to mismatches between
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