Visual Basic for Applications Reference
The object's source document can't be loaded, or the application that created the object isn't available.
This error occurs when you try to activate a linked object (set Action = 7) and the file specified in the SourceDoc property has been deleted or no longer exists.
This error also occurs when you activate an object (set Action = 7), and the action specified by the Verb property isn't valid. Some applications that provide objects may support different verbs, depending on the state of the application. All the verbs supported by an application are listed in the ObjectVerbs property list. However, some verbs may not be valid for the application's current state.