Message type: E = Error
Message class:  ID_FI_OVF - Online validation Framework Messages 
Message number: 013
Message text: Error during validation; unknown communication destination &1
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The SAP error message ID_FI_OVF013, which states "Error during validation; unknown communication destination &1," typically occurs in the context of financial operations, particularly when dealing with the posting of documents or during the execution of certain financial transactions. This error indicates that the system is unable to find a valid communication destination specified in the configuration or transaction. Causes: Incorrect Configuration: The communication destination specified in the configuration might not be set up correctly or is missing. Missing RFC Destination: The system may be trying to communicate with an external system or service, and the RFC (Remote Function Call) destination is not defined or is incorrect. Authorization Issues: The user may not have the necessary authorizations to access the specified communication destination. System Issues: There may be issues with the SAP system itself, such as connectivity problems or misconfigurations. Solutions: Check Communication Destination: Go to transaction code SM59 to check the RFC destinations. Ensure that the destination specified
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