How To Fix KH871 - One step backwards is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: KH - CO-PA Reporting

• Message number: 871

• Message text: One step backwards is not possible

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message KH871 - One step backwards is not possible ?

  The SAP error message KH871 ("One step backwards is not possible") typically occurs in the context of the SAP Controlling (CO) module, particularly when dealing with the process of posting or reversing cost allocations, such as in internal orders or cost centers.
  Cause:
  The error message KH871 usually indicates that you are trying to reverse a transaction or step that cannot be reversed because it is not the last step in a sequence of postings. This can happen in various scenarios, such as:
  
  Multiple Postings: If there have been multiple postings after the one you are trying to reverse, SAP will not allow you to go back to that step.
  Document Status: The document you are trying to reverse may have already been processed or closed, making it impossible to reverse it.
  Dependencies: There may be dependencies on other documents or transactions that prevent the reversal.
  
  Solution:
  To resolve the KH871 error, consider the following steps:
  
  
  Check Posting Sequence: Review the sequence of postings related to the transaction you are trying to reverse. Ensure that you are attempting to reverse the most recent posting.
  
  
  Use Correct Transaction: Make sure you are using the correct transaction code for reversing the posting. For example, if you are trying to reverse a cost allocation, ensure you are using the appropriate transaction for that purpose.
  
  
  Consult Document Flow: Check the document flow to see if there are subsequent postings that depend on the one you are trying to reverse. You may need to reverse those postings first.
  
  
  Review Document Status: Ensure that the document you are trying to reverse is still open and has not been finalized or closed.
  
  
  Consult with a Colleague or SAP Support: If you are unsure about the sequence of postings or the status of the documents, consult with a colleague or reach out to SAP support for assistance.
  
  
  Related Information:
  
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in SAP CO, such as:
  
  KSV5: Display actual/plan comparison for internal orders.
  KOB1: Display actual line items for internal orders.
  KSV1: Create a plan for internal orders.
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, specific configurations or updates can resolve underlying issues.
  
  
  Documentation: Review SAP documentation or training materials related to cost accounting and internal orders for a better understanding of the processes involved.
  
  
  By following these steps, you should be able to identify the cause of the KH871 error and take appropriate action to resolve it.