How To Fix FKKVT_ILLEGAL_STATE004 - Return code &1 for function module &2 - inform system administration

FKKVT_ILLEGAL_STATE004 - Overview

• Message type: E = Error

• Message class: FKKVT_ILLEGAL_STATE - Error category "illegalState"

• Message number: 004

• Message text: Return code &1 for function module &2 - inform system administration

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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FKKVT_ILLEGAL_STATE004 - Details

• The SAP error message FKKVT_ILLEGAL_STATE004 typically indicates that there is an illegal state encountered in the context of a function module related to contract accounts receivable and payable (FI-CA). The error message includes a return code and the name of the function module that triggered the error. 
  
  Cause:
  The error can occur due to several reasons, including but not limited to:
  
  Data Inconsistencies: There may be inconsistencies in the data being processed, such as missing or incorrect entries in the database tables.
  
  Configuration Issues: Incorrect configuration settings in the FI-CA module can lead to unexpected states during processing.
  Custom Code: If there are custom enhancements or modifications in the function module, they may not handle certain states correctly.
  System Bugs: There may be bugs in the SAP system or the specific version you are using that lead to this error.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  Check the Return Code: Analyze the return