How To Fix GU634 - If necessary, reverse document &3 for period 000 in &1; see long text

GU634 - Overview

• Message type: E = Error

• Message class: GU - FI-SL utilities

• Message number: 634

• Message text: If necessary, reverse document &3 for period 000 in &1; see long text

What causes this issue?

You want to perform balance carryforward for the year &V1&.
The system has determined that there is already at least one actual line
item with document number (DOCNR) &V3& for ledger &V2& in period 000 of
fiscal year &V1&.

System Response

Since the balance carryforward sets <ZH>all</> totals values in period 0
of the new year to zero and then transfers the totals values of the old
year in period 0 of the new year, it is very likely that, after balance
carryforward, the totals of period 0 in the new fiscal year do <ZH>not
</> match the posted line items.

How to fix this error?

Check document &V3& and either reverse it or achive it before performing
balance carryforward.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GU634 - If necessary, reverse document &3 for period 000 in &1; see long text ?

  The SAP error message GU634 typically indicates an issue related to the reversal of a document in a specific period. This error can occur in various modules, particularly in Financial Accounting (FI) or Controlling (CO), when there is an attempt to reverse a document that is not allowed due to certain conditions.
  
  Cause:
  
  Period Closure: The period you are trying to reverse the document for is closed. In SAP, once a financial period is closed, no further postings can be made to that period.
  Document Type Restrictions: Certain document types may have restrictions on reversals, especially if they are related to specific accounting processes.
  Configuration Settings: The system configuration may prevent reversals in certain scenarios, such as if the document is linked to a specific transaction type or if there are open items that need to be cleared first.
  Authorization Issues: The user may not have the necessary authorizations to perform the reversal in the