Message type: E = Error
Message class:  F0 - FI batch program messages 
Message number: 301
Message text: For country &1, payment reference &2 is not correct
There is a check routine defined in the system for country &V1&. When
this routine was used for country &V2&, it found an error.
The error may be the result of an incorrect check digit. Other causes
may be an incorrect field length (the number is too great, or the value
too short) or the use of a character which is not permitted (an
alphanumeric value in a numeric field, for example).
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Check whether the number was transferred correctly from the original
document.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message F0301 indicates that there is an issue with the payment reference for a specific country. This error typically arises during the processing of payments or when attempting to post transactions that involve payment references. Here’s a breakdown of the cause, potential solutions, and related information for this error:
Cause: Incorrect Payment Reference Format: The payment reference provided does not conform to the expected format for the specified country. Different countries have different requirements for payment references. Missing Configuration: The payment reference might not be configured correctly in the system for the specific country. Invalid Characters: The payment reference may contain invalid characters or exceed the allowed length. Country-Specific Rules: Some countries have specific rules regarding payment references that must be adhered to.
Solution: Check Payment Reference Format: Verify that the payment reference you are using adheres to the format required for the specified country. Consult the relevant documentation or guidelines for the country
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