Integrations (PTC products, 3rd party products and code) > 3rd party product integrations (CM, DOORS, Rose, Simulink and XML) > Integration for IBM Rational DOORS > Troubleshooting > Error message: The following DOORS objects are not valid for a "DOORS to Modeler" requirement synchronization (Integration for IBM Rational DOORS)
  
Error message: The following DOORS objects are not valid for a "DOORS to Modeler" requirement synchronization (Integration for IBM Rational DOORS)
This message appears when a DOORS object is not valid for a DOORS to Modeler requirement synchronization, resulting in Integration for IBM Rational DOORS aborting the synchronization.
To resolve this problem, either:
Delete the invalid objects from the DOORS module.
Move the invalid objects in the DOORS module so that they are outside of the scope of the root object for the Integration for IBM Rational DOORS mapping.
Make Integration for IBM Rational DOORS ignore the invalid objects through a user defined filtering/access control DXL file. Use the ARTCanReadObject function to return FALSE for the invalid objects.
For more information about defining filtering and access control through DXL, see Defining additional filtering and access control through DXL (Integration for IBM Rational DOORS).