Message type: E = Error
Message class:  FKKINV - Invoicing in Contract Accounts Receivable and Payable 
Message number: 339
Message text: Periodic bill data for partner &1 and account &2 is incomplete
When you enter data for periodic bills, you have to enter the following:
Billing cycle
Day the period ends
Start date
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 FKKINV339 indicates that there is incomplete periodic billing data for a specific partner and account. This error typically arises in the context of contract accounts receivable and payable (FI-CA) when the system attempts to process a periodic billing run but finds that the necessary data is missing or incomplete.
Cause: Missing Data: The periodic billing data for the specified partner (customer/vendor) and account is not fully maintained. This could include missing billing plans, billing frequency, or other relevant details. Incorrect Configuration: The configuration settings for the billing process may not be set up correctly, leading to incomplete data. Data Inconsistencies: There may be inconsistencies in the master data or transactional data related to the account or partner. Incomplete Contract: If the contract or agreement related to the billing is not fully defined or is missing key components, it can lead to this error.
Solution: Check Billing Data: Review the periodic billing data for
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FKKINV338 Reversal reason &1 for reversal of invoicing documents is unknown
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FKKINV337 Day &1 does not agree with billing cycle &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FKKINV340 Time periods overlap for charge/discount key &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FKKINV341 Charge/discount key &1 is already entered for valid-from &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.