Auto Dimensions not generating

[pavanabatchu]

Hi all,
In catia drafting workbench, the auto dimension in not working nor is the generate dimension step by step. when i click the generate dimension step by step,i am not getting dimensions generated but am getting a window 'Generated Dimension analysis' which is showing few check boxes with group headers 'constraint analysis in 3d' and 'Dimension analysis in 2d' . what could be the solution for this problem?
Thanx,
pavan

 

[MrCATIA]

Make sure you added constraints within the sketches of the pointed 3D model.