i had that happen last year.i had a frame of honey in my shop with the door opened.within 2hours i had the frame full of bees robbing my honey.i watched the direction they were flying and caught 30 bees off the frame and went the way they were flying .i let 1 go and followed her till i could not see her anymore.i did that till i found the hive.you might want to give it a try .