How To Fix FKKBIX381 - Incompatible change of reference field in field &1 in class &2

FKKBIX381 - Overview

• Message type: E = Error

• Message class: FKKBIX - Conv.Inv.: Billing (Invoice Preprocessing)

• Message number: 381

• Message text: Incompatible change of reference field in field &1 in class &2

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

FKKBIX381 - Details

• The SAP error message FKKBIX381 indicates that there is an incompatible change in a reference field within a specific class. This typically occurs in the context of data model changes, particularly when there are modifications to the structure of a database table or a data element that is referenced in a class.
  
  Cause:
  
  Incompatible Changes: The error usually arises when a field that is referenced in a class has been altered in a way that is not compatible with existing references. This could include changes in data type, length, or other attributes that affect how the field is used in the class.
  Data Model Changes: Changes made to the underlying data model, such as adding or removing fields, changing field types, or modifying relationships between tables, can lead to this error.
  Custom Development: If there are custom developments or enhancements that rely on specific field definitions, any changes to those fields can trigger this