[Error] Can't move on an interior past a certain point?

[Tramon81]

So I made a 36 by 11 interior with only floor boards walls and black tiles as borders. I'm able to enter and from the entrance move to a certain point, but I can't go left more than a few blocks from there when i technically should. It's like a invisible wall. I checked on every layer, there's nothing there. but this continues to happen nonetheless. Please any and all help is much appreciated.

 

[1000pokemonlover]

have you checked the passibility

 

[lemiho19]

did you try erasing something with a blank looking tile from the tile sheet? (sometimes the first tile looks blank but is still not a passable object)