Sahil Sura
Ansys Employee

Hi @amando.gallardo,
Setting the analysis type to 2D from the properties might be helpful.
You can also use the Project command to project the features on surfaces or solids. 
Assigning a cross-section to a line body in SpaceClaim itself makes it easy for the user to visualize in mechanical.
The following video may be helpful for the same- Creating and Analysing a Beam and Shell Bridge Model with ANSYS SpaceClaim and Mechanical - YouTube 
You can also get more details on Body Filtering property and Mixed import resolution from the following references-
General Information (

Mixed Import Resolution (

Solutions to some of the errors can also be found in Problem Situations (

Hope that helps!