Message type: E = Error
Message class:  FKK_EBS - Interface between FI-CA and External Billing System 
Message number: 309
Message text: Account statement only possible if selection entity = VKONT
Bank statements can only be requested if the selection entity (field
<LS>SEL_ENT</>for Customizing table
<LS>FKK_EBS_POI_SYST</> has the value "02") is a
contract account.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Dispense with the bank statement or change your system settings so that
you can work with the contract account as a selection entity.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FKK_EBS309 indicates that an account statement can only be generated if the selection entity is set to VKONT (which refers to the customer account). This error typically arises in the context of Electronic Bank Statement (EBS) processing in SAP, particularly when dealing with the integration of bank statements and customer accounts.
Cause: The error occurs when the system is trying to generate an account statement for a selection entity that is not compatible with the expected entity type. In this case, the system expects the selection entity to be a customer account (VKONT), but it may have been set to a different entity type, such as a vendor account or another type of account.
Solution: To resolve this error, you can take the following steps: Check Selection Criteria: Ensure that the selection criteria for generating the account statement are correctly set to use the customer account (VKONT). This can usually be
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