ok im making my castle and i finished the inside but the out side i can finish because im getting a bug or something i am useing the S castle and the nine divine court and going around the from the court to the main part the navmesh wont go any further then i tryed to bring the main part and it did the same then i tryed to connect them with the (Q) but it wont work?? any fixes?

You are probably running into a cell border. Hit B and see. If you search for it, there is a lot of information about how to work with borders. The nodes and edges need to match up with those across the border. If you have then right, it will generate a thick green line on the edges when you finalize.

YEP!!! thats it thank u sir that helped alot

Glad to help. It seems like that is one of the odd and quirky little things we all have to discover somehow.