How To Fix FS864 - Communication error with the external tax system (&)

FS864 - Overview

• Message type: E = Error

• Message class: FS - Messages from Tax Routines / Prenumbered Checks

• Message number: 864

• Message text: Communication error with the external tax system (&)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FS864 - Communication error with the external tax system (&) ?

  The SAP error message FS864, which indicates a "Communication error with the external tax system," typically arises when there is a failure in the communication between SAP and an external tax calculation system. This can occur in various scenarios, such as during the processing of invoices, tax calculations, or when interfacing with third-party tax software.
  Causes:
  
  Network Issues: Problems with the network connection between SAP and the external tax system can lead to communication errors.
  Configuration Errors: Incorrect configuration settings in the SAP system or the external tax system can prevent successful communication.
  Service Availability: The external tax service may be down or unavailable, leading to communication failures.
  Firewall or Security Settings: Firewalls or security settings may block the communication between the two systems.
  Incorrect API Endpoints: If the API endpoints or URLs used for communication are incorrect, it can result in errors.
  Data Format Issues: If the data being sent to the external tax system is