Message type: E = Error
Message class:  EK - IS-U Accounts Receivable and Payable 
Message number: 600
Message text: The installment plan terminates at the end of the billing period
You tried to create an installment plan whose last installment is due
on &v1&. However, the billing period already ends on &v2&.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
You can continue processing. However, budget billing payments for this
budget billing plan cannot be reposted in invoicing if the budget
billing receivables included in the installment plan are not fully
paid. In invoicing the budget billing plans affected are put on an
exception list.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message EK600, which states "The installment plan terminates at the end of the billing period," typically occurs in the context of installment plans for billing in SAP. This error indicates that the installment plan you are trying to process has reached its end date or has been configured to terminate at the end of the current billing period.
Cause: End of Installment Plan: The installment plan has reached its defined end date, meaning no further installments can be processed. Billing Period Configuration: The configuration of the installment plan may specify that it only lasts for a certain billing period, and you are attempting to process a transaction beyond that period. Incorrect Dates: The dates set in the installment plan may not align with the current billing cycle or may have been incorrectly configured.
Solution: Review Installment Plan Dates: Check the start and end dates of the installment plan to ensure they are set
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