What does the idiom barking up the wrong tree mean?

Relevant answers:

What does the idiom she's barking up the wrong tree?
That she is looking to fight the wrong persone.g- A weak lady fighting a strong bodybuilder ladyHope i helpedand sorry for the horrible example at least it explains :)
What it mean she's barking up the wrong tree?
it means she has placed the source of her dissatisfaction on the wrong person...a person that possessed no fault in the current grievance
He was barking up the wrong tree?
The phrase means to discuss something completely different from the subject in hand or to be confused as to the expected response
What does the idiom bark up the wrong tree mean?
You made a mistake and possibly to the wrong person
What does the phrase barking up the wrong tree mean?
Making a mistake or a false assumption in something you are trying to achieve.