We've been having a few problems here trying to create a site model from contour lines. The rough process we're using is as follows:
The contours start out as a DWG file
File imported into VW Landmark 9.5.3 (OS X 10.2.5) using both "2D/3D objects" and "3D objects only" options.
All objects are ungrouped 3d Polygons, with appropriate Z-information, and are on the same layer.
Using the "Filter 3D Polygons" function, we try to clean up the polygons as much as possible.
Check 3D Polygons for intersections, etc., and fix them.
Try to create site model using the "Site Model" function.
Now, this is where things usually get interesting. A few different things tend to happen. First, there's the message that there aren't any DTMs and so the operation is quitting. If we repaste the polygons into a new file, then that problem usually gets solved. If we get the program to begin generating the site, it usually either freezes, or quits with a number of error messages, the most prevalent being "Could not find NNA_DTM_HIDDEN_RECORD".
Can anyone think of what's going on with this file/function?