How To Fix WZ851 - Node does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: WZ - Workflow: Model objects

• Message number: 851

• Message text: Node does not exist

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 WZ851 - Node does not exist ?

  SAP Error Message:
  
  WZ851 - Node does not exist
  
  Cause:
  The error message WZ851 - Node does not exist typically occurs in SAP Workflow when the system tries to access a workflow container node that has not been defined or does not exist in the current workflow context.
  In SAP Workflow, a node refers to an element in the workflow container, such as a container element or a container node. If a workflow step or a method tries to read or write to a container node that is not defined in the workflow container, the system raises this error.
  Common scenarios causing this error include:
  
  Typographical errors in the node name when accessing container elements.
  The node was deleted or not created in the workflow container.
  The workflow container structure has changed, but the workflow logic still refers to old nodes.
  Incorrect or missing container mapping in the workflow definition or task.
  
  
  Solution:
  To resolve the WZ851 Node does not exist error, follow these steps:
  
  
  Check the Workflow Container:
  
  Go to the workflow builder (transaction SWDD).
  Open the workflow definition.
  Check the container structure and verify if the node (container element) you are trying to access exists.
  
  
  
  Verify Node Names:
  
  Ensure that the node name used in the workflow step, method, or container assignment exactly matches the node name defined in the container.
  Pay attention to case sensitivity and spelling.
  
  
  
  Adjust Container Mapping:
  
  If the node is missing, add the required container element to the workflow container.
  If the node is supposed to be passed from a task or subworkflow, verify the container mapping between the parent and child workflows or tasks.
  
  
  
  Check Workflow Logic:
  
  Review the workflow steps or methods that access the container node.
  Make sure they are accessing valid container elements.
  
  
  
  Transport and Version Consistency:
  
  If the workflow was transported from another system, ensure that the container structure is consistent across systems.
  Sometimes, inconsistencies arise due to incomplete transports.
  
  
  
  Debugging:
  
  Use transaction SWUS or SWI1 to analyze the workflow log.
  Use the workflow debugger to trace where the node access fails.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SWDD - Workflow Builder (to check and edit workflow container)
  SWI1 - Workflow Log (to analyze workflow errors)
  SWUS - Workflow Error Analysis
  SWI2_FREQ - Workflow Runtime Analysis
  
  
  
  SAP Notes:
  
  Check SAP Notes related to workflow container issues if the problem persists.
  
  
  
  Documentation:
  
  SAP Help Portal: Workflow container and node concepts.
  SAP Workflow Developer Guide.
  
  
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Workflow tries to access a container node that does not exist in the workflow container.
  
  
  Solution
  Verify and correct the container node name, add missing nodes, adjust container mapping.
  
  
  Tools
  SWDD, SWI1, SWUS, SWI2_FREQ for analysis and correction.
  
  
  
  
  If you provide the exact context or workflow step where this error occurs, I can help you with more specific guidance.