infrequentflyer789, thanks very much. I'll take a look at it to understand more, but it appears to be the case and the software was changed. Without wriggling loose from the exception, the notion of mode confusion may be a distant cousin of this type of accident in a kind of psychological way, where one isn't "prevented" by the airplane from acting but by oneself, (human factors), though the material effects may be similar. Thanks again...