Message type: E = Error
Message class:  F0 - FI batch program messages 
Message number: 307
Message text: Payment &2&3 contains line items with no or different reference codes
Error message extract from SAP system. Copyright SAP SE.
The SAP error message F0307 indicates that there are line items in a payment document that have no reference codes or have different reference codes. This can occur during the processing of payment runs or when attempting to post a payment document. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Missing Reference Codes: Some line items in the payment document do not have any reference codes assigned to them. Different Reference Codes: The line items may have different reference codes, which can cause inconsistencies in the payment processing.
Configuration Issues: There may be configuration settings in the payment processing that require all line items to have the same reference code or to have reference codes at all. Data Entry Errors: Manual entry errors during invoice or payment processing can lead to missing or inconsistent reference codes.
Solution: Check Line Items: Review the line items in the payment document to identify which ones are
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
F0306 Payment data already exists, cannot be copied
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
F0305 Dunning data already exists, copying not possible
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
F0308 Days in arrears must be strictly in ascending order
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
F0309 Item texts with valid reference numbers were found.
What causes this issue?  Item texts with valid reference numbers were found.System Response  The reference numbers were transferred to the generated p...
Click on this link to search all SAP messages.