How To Fix FI636 - You must not change assignment to company code &

FI636 - Overview

• Message type: E = Error

• Message class: FI - TR-FM Funds Management

• Message number: 636

• Message text: You must not change assignment to company code &

What causes this issue?

Funds Management is activated in the specified company code.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check that you have chosen the right FM area. You may have to go to
the Funds Management implementation guide and deactivate Funds
Management before carrying out your assignment, then reactivate it
afterwards.

Error message extract from SAP system. Copyright SAP SE.

FI636 - Details

• The SAP error message FI636 ("You must not change assignment to company code &") typically occurs when there is an attempt to change the assignment of a financial document or transaction to a different company code, which is not allowed in certain contexts. This error is often related to the integrity of financial data and the structure of the SAP system, where company codes represent separate legal entities.
  
  Cause:
  
  Company Code Assignment: The document or transaction you are trying to modify is already assigned to a specific company code, and SAP restricts changing this assignment to maintain data integrity.
  Document Type Restrictions: Certain document types may have restrictions on changing company codes after they have been posted.
  Configuration Settings: The system configuration may prevent changes to company code assignments for specific transactions or document types.
  Posting Period: If the document is in a closed posting period, changes to the company code may not be allowed.
  
  
  Solution:
  
  Check