How To Fix DMCLG851 - A block cannot be it's own predecessor

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 851

• Message text: A block cannot be it's own predecessor

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 DMCLG851 - A block cannot be it's own predecessor ?

  The SAP error message DMCLG851, which states "A block cannot be its own predecessor," typically occurs in the context of process modeling or workflow design within SAP systems, particularly in the area of SAP Business Workflow or SAP Process Integration (PI).
  Cause:
  This error arises when there is a logical inconsistency in the workflow or process model where a block (or step) is incorrectly set to reference itself as a predecessor. In other words, the system detects that a block is trying to point back to itself, which creates a circular reference and is not allowed in process modeling.
  Solution:
  To resolve this error, you should:
  
  
  Review the Workflow/Process Model: Open the workflow or process model where the error is occurring. Look for the block that is causing the issue.
  
  
  Check Predecessor Relationships: Examine the predecessor settings of the block in question. Ensure that it does not reference itself. You may need to adjust the flow to point to a valid predecessor block.
  
  
  Modify the Flow: If you find that the block is indeed set to be its own predecessor, change the configuration so that it points to a different block that logically precedes it in the workflow.
  
  
  Validate the Model: After making changes, validate the workflow or process model to ensure that there are no other logical errors or inconsistencies.
  
  
  Test the Workflow: Once the changes are made, test the workflow to confirm that it functions as expected without triggering the error.
  
  
  Related Information:
  
  Documentation: Refer to SAP's official documentation on workflow design and process modeling for best practices and guidelines.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Support: If the issue persists after troubleshooting, consider reaching out to SAP support for further assistance.
  
  By following these steps, you should be able to resolve the DMCLG851 error and ensure that your workflow or process model is correctly configured.