Problem: adding z values to contour lines extracted from a DTM

Discussion created by Jerle_Shannara on Mar 24, 2016
Latest reply on Mar 24, 2016 by Dan_Patterson

Good morning everybody! Question is simple: I have a contour lines dwg extracted from a DTM. I would to import this dwg file in revit so i can obtain a toposurface in where i put my project. The problem is: when i want to add z information with 3D analyst it tells me "the input feature class must have z values". How can obtain z values? I did a similar operation with points but I don't rememeber how (I did it with my teacher). Is there anybody who can help me please? Thank you very much