This image is a 10 mile radius sphere with a line segment that travels beyond the edges of the sphere but within the boundary that a cube would have.
You can see the highlighted square is the extent of the DWG file and line extends outside of the sphere at each end but is still inside the boundary of where a cube would lie instead.
This image is the same file but the line is altered to extend beyond the edge of the sphere/cube extent.
This is the message that appears when I reloaded the file after altering the line’s extent.
The warning can be avoided if we ensure that the DWG file doesn’t have any…