u/homebody2345

I am on the board of a small camp and retreat center in rural Missouri. I was told that there has been a bat problem in one room of a 100 year old lodge for OVER 30 YEARS. This blew my mind, but I was told that pest control could not figure out where the bats were coming from, so they couldn't eliminate them. Is this unusual? I find it shocking that bats could infest an old building but the professionals couldn't figure out the source. I want to get this taken care of, but it is so bizarre that I'm not sure where to start. Does this sound like the exterminators were grossly incompetent or is this a normal occurrence? Any advice would be awesome before I tackle this.