Hi Tina,
The Click action is a TC method, and it applies to onscreen objects. In TestComplete, onscreen objects are retrieved through the Child and FindID methods (which are TC methods too). As you are using a native getAccessibleChild method, the retrieved object is not considered as an onscreen object, so, the Click method is not available to this object.
So, to be able to use the Click method for the target object, you need to use the Child method to retrieve the object.
Please see the "Onscreen Object" and "Click Action" help topics for details.
