How To Fix BK171 - A document is always completely reversed.

BK171 - Overview

• Message type: E = Error

• Message class: BK - Create, Display, Reverse Controlling Document

• Message number: 171

• Message text: A document is always completely reversed.

What causes this issue?

You selected one or more rows and chose the "Reversal marking" button.

System Response

As the system always reverses a document fully, the marking also
applies to the whole document, even if you only select a part of it.
The system uses the posting function to reverse the marked documents.

Error message extract from SAP system. Copyright SAP SE.

BK171 - Details

• The SAP error message BK171 ("A document is always completely reversed") typically occurs when you attempt to reverse a financial document that cannot be partially reversed. This is a common scenario in SAP Financial Accounting (FI) when dealing with certain types of documents, such as invoices or journal entries.
  
  Cause:
  
  Document Type Restrictions: Some document types in SAP are designed to be reversed only in their entirety. For example, certain types of invoices or credit memos may not allow partial reversals.
  Document Status: The document you are trying to reverse may already be in a status that does not allow for partial reversals.
  Configuration Settings: The configuration settings in the SAP system may dictate that certain document types must be fully reversed.
  
  
  Solution:
  
  Full Reversal: If you encounter this error, you will need to reverse the entire document rather than attempting a partial reversal. Use the appropriate transaction code (e.g., FB08 for reversing a document) and