How To Fix FKKEXC266 - Postings were repeated in simulation mode

FKKEXC266 - Overview

• Message type: E = Error

• Message class: FKKEXC - Message Class for External Payments

• Message number: 266

• Message text: Postings were repeated in simulation mode

Self-Explanatory Message

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FKKEXC266 - Details

• The SAP error message FKKEXC266 indicates that there are repeated postings in simulation mode. This typically occurs in the context of the Contract Accounts Receivable and Payable (FI-CA) module when you are trying to simulate a posting that has already been processed in the same session.
  
  Cause:
  
  Repeated Simulation: The error usually arises when the same transaction is attempted to be simulated multiple times without any changes. SAP detects that the same posting has already been processed in the current session.
  Incorrect Configuration: There may be issues with the configuration of the posting logic or the simulation settings.
  Data Integrity Issues: There could be underlying data integrity issues that cause the system to think that the same posting is being attempted again.
  
  
  Solution:
  
  Check for Duplicates: Ensure that you are not trying to simulate the same transaction multiple times. If you need to simulate a different transaction, make sure to change the relevant parameters.
  Clear Session: If