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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message FI636 - You must not change assignment to company code & ?

  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 Document Status: Verify if the document is already posted. If it is, you may need to reverse the document and create a new one with the correct company code.
  Review Configuration: Consult with your SAP configuration team to understand if there are specific settings that prevent changing the company code. They may need to adjust the configuration if necessary.
  Use Correct Transaction: If you need to change the company code for a document, consider using the appropriate transaction or process designed for this purpose, such as creating a new document with the correct company code.
  Consult SAP Notes: Check SAP Notes or the SAP Support Portal for any known issues or updates related to this error message.
  User Authorization: Ensure that you have the necessary authorizations to make changes to the document or transaction.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on financial document processing and company code assignments.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FB01 (Post Document), FB08 (Reverse Document), and others that may be involved in financial postings.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to involve your SAP support team or consult with an SAP expert for further assistance.