When undetermined,

In [When undetermined], specify the action to be taken when whether the conditions are met cannot be determined. This can happen when there is no measurement value to evaluate - e.g., when the locator tool specified in [Value1] has failed to find the workpiece. Select one of the following options to specify the action to be taken:

[Invalidate this result.]
Invalidate this position.
[Add the following value to model ID:]
Add the specified value to the model ID.