Error: Section 2 has less than two nodes?

[C4Detonator]

Hello, I am almost finished with my first track (took days to make) and when I completed my splines, I go to save as a complier track, but I get this message :      Error: Section 2 of the spline has less than 2 nodes.
                                   Error: There is an invalid spline in activity National.
                                   Compilation aborted because your track failed to pass the pre-compile check.
I have a few areas that cross over each section, but I am not sure what it means that section 2 has less than 2 nodes. Can you help me out, I would really appreciate it.

[mototank]

look for any squares in your spline the only squares should be where u linked the splines together and right after your start gate. to fix a square in your spline that shouldn't be, click the node then select "merge sections..." (a colorful button on the right side panel).