How To Fix ON211 - Internal error: Undefined relationship type(s)

ON211 - Overview

• Message type: E = Error

• Message class: ON - Tools in area Object Modeler / Object Editor

• Message number: 211

• Message text: Internal error: Undefined relationship type(s)

What causes this issue?

Internal error: Relationships were found in the database whose type
does not agree with the relationship types defined in the program.

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?

Error message extract from SAP system. Copyright SAP SE.

ON211 - Details

• The SAP error message ON211 "Internal error: Undefined relationship type(s)" typically occurs in the context of SAP's Object Management System (OMS) or when dealing with object relationships in various modules, such as SAP PM (Plant Maintenance) or SAP PS (Project System). This error indicates that the system has encountered a relationship type that is not defined or recognized in the current context.
  Causes:
  
  Missing Configuration: The relationship type that the system is trying to use may not be defined in the configuration settings.
  Data Inconsistency: There may be inconsistencies in the data, such as missing or incorrect entries in the relevant tables.
  Custom Development: If there are custom developments or enhancements, they may not be handling relationship types correctly.
  Transport Issues: If the system has recently undergone a transport of changes, some relationship types may not have been transported correctly.
  
  Solutions:
  
  
  Check Configuration:
  
  Go to the relevant configuration settings in SAP (e.g., SPRO) and verify that the relationship