Hi Please can some one explain this proceedure to me.
 
I have a runnway scene. The camera is a nodal pan set up. I want to solve the camera movement but also track an aeroplane that passes the camera. I have set up two groups, i.e. Group One tracks the background and group two tracks the passing aeroplane.
 
Everything seems to work when I solve for camera but when I export into max8 I only get the background helpers....where are the moving aeroplane helpers?? I am using MM4.
 
Your help is much apreciated.

sometimes if you have something selecting before exporting, only this one thing will be exported.
For example, it is common to have a 2D tracks selected without knowing and when exporting into the 3D app, only this track will have been exported.
In your case, since you have two groups, make sure that none of hte two are selected. You probably exported when the 'background markers' group was selected.
Otherwise, all markers should export nicely.

Thanks for the advise. I will try this.