"Distance between Analytical and Physical Models of Structural Element is beyond tolerance of 150"

What exactly does this mean? I get that I set the tolerance. I was putting in braces when I got the error. Speaking of braces, sometimes they will ask me to specify a Work Plane (gridline) and other times they do not. Why? I get asking me all the time OR never. I don't know how to fix it. Sometimes deleting and redrawing "fixes" it and other times not. Hard to develop best practices sometimes....

It's Friday!!!!!