How To Fix STEP451 - &1 &2: PVS nodes only allowed in one class. &3 ignored

SAP Error Message - Details

• Message type: E = Error

• Message class: STEP - ISO 10303 STEP Mapping Messages

• Message number: 451

• Message text: &1 &2: PVS nodes only allowed in one class. &3 ignored

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message STEP451 - &1 &2: PVS nodes only allowed in one class. &3 ignored ?

  The SAP error message "STEP451 &1 &2: PVS nodes only allowed in one class. &3 ignored" typically occurs in the context of Process Visualization System (PVS) or when dealing with process control and visualization in SAP. This error indicates that there is a configuration issue where a PVS node is being assigned to multiple classes, which is not allowed.
  Cause:
  
  Multiple Class Assignment: The primary cause of this error is that a PVS node is being assigned to more than one class. In SAP, each PVS node should only belong to a single class to maintain the integrity of the data and the visualization structure.
  Configuration Error: There may be a misconfiguration in the PVS setup or in the way classes and nodes are defined in the system.
  
  Solution:
  
  
  Review PVS Configuration: Check the configuration of the PVS nodes and classes. Ensure that each PVS node is assigned to only one class. You can do this by:
  
  Navigating to the PVS configuration settings in SAP.
  Identifying the nodes that are incorrectly assigned to multiple classes.
  Reassigning the nodes to the correct class or removing the duplicate assignments.
  
  
  
  Correct Class Assignments: If you find that a node is assigned to multiple classes, decide which class it should belong to and update the configuration accordingly.
  
  
  Testing: After making the necessary changes, test the configuration to ensure that the error no longer occurs and that the PVS functions as expected.
  
  
  Documentation: Document the changes made to the configuration for future reference and to help prevent similar issues from occurring.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes and Knowledge Base Articles for any specific guidance or patches related to this error message. SAP frequently updates its documentation and may have specific recommendations for your version of the software.
  PVS Documentation: Review the official SAP documentation for the Process Visualization System to understand the best practices for configuring nodes and classes.
  Support: If the issue persists after following the above steps, consider reaching out to SAP support for further assistance. They can provide more detailed insights based on your specific system configuration.
  
  By addressing the configuration issue and ensuring that each PVS node is assigned to only one class, you should be able to resolve the error message STEP451.