The exception that is thrown when referencing an object that is no longer valid.

Namespace: Autodesk.Revit.Exceptions
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)

Syntax

C#
`[SerializableAttribute] public class InvalidObjectException : InvalidOperationException`

Visual Basic
`<SerializableAttribute> _ Public Class InvalidObjectException _ Inherits InvalidOperationException`

Visual C++
`[SerializableAttribute] public ref class InvalidObjectException : public InvalidOperationException`

Remarks

The object may no longer exist for many reasons:

The object was explicitly deleted from the database.
A change to other database items caused the item to be automatically deleted from the database.
The object no longer exists as its creation was undone (by rolling a transaction back).

SystemObject
  SystemException
    Autodesk.Revit.ExceptionsApplicationException
      Autodesk.Revit.ExceptionsInvalidOperationException
        Autodesk.Revit.ExceptionsInvalidObjectException