How To Fix RH220 - Endless loop generated by link node &, ID &

SAP Error Message - Details

• Message type: E = Error

• Message class: RH - BW: Hierarchies ( basic functions )

• Message number: 220

• Message text: Endless loop generated by link node &, ID &

What causes this issue?

Link nodes are expanded when you activated a hierarchy, or executed a
time-dependent hierarchy in the query. The result is a recursion,
meaning that when a link node is expanded, the link node is directly or
indirectly available over several link nodes in the subtree of the
original node.

System Response

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

How to fix this error?

The hierarchy is not consistent. The link node with the technical name
&V1& has to be inserted in such a way that no recursion results.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RH220 - Endless loop generated by link node &, ID & ?

  The SAP error message RH220, which indicates "Endless loop generated by link node &, ID &," typically occurs in the context of SAP HR (Human Resources) workflows or processes, particularly when there is a problem with the configuration of a workflow or a process chain.
  Cause:
  
  
  Incorrect Workflow Configuration: The most common cause of this error is an incorrect configuration in the workflow, where a link node is set up in such a way that it creates a circular reference. This means that the workflow keeps calling itself without reaching a termination point.
  
  
  Data Issues: Sometimes, the data being processed may lead to conditions that trigger the endless loop, such as incorrect or missing data in the relevant infotypes.
  
  
  Custom Code: If there are custom enhancements or modifications in the workflow, they might inadvertently create loops.
  
  
  Solution:
  
  
  Review Workflow Configuration: 
  
  Check the workflow definition in the SAP Business Workflow (transaction SWDD). Look for link nodes and ensure that they do not reference themselves or create circular paths.
  Ensure that the conditions for transitions between nodes are correctly defined.
  
  
  
  Debugging: 
  
  Use transaction SWI1 to analyze the workflow instances that are causing the issue. This can help identify where the loop is occurring.
  You can also use transaction SWI2_FREQ to find frequently executed workflows that might be stuck in a loop.
  
  
  
  Check for Data Issues: 
  
  Review the data being processed in the workflow. Ensure that all required fields are populated correctly and that there are no inconsistencies in the data.
  
  
  
  Custom Code Review: 
  
  If there are any custom enhancements or modifications, review the code to ensure that it does not inadvertently create loops.
  
  
  
  Testing: 
  
  After making changes, test the workflow thoroughly to ensure that the issue is resolved and that no new issues are introduced.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Review the SAP documentation for workflows to ensure that best practices are being followed in the configuration.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  If the problem persists after following these steps, it may be beneficial to consult with an SAP expert or reach out to SAP support for further assistance.