We did one more test and we realized a problem to save the dwg file. I attached the files. We tried these four different “extension” and note that in the folder, all “dwg files” are “0 KB”:
Usually, after prepare the dwg we open it on ArcGIS (version 10 or 10.2), but is not working.
I found a polyline with two identical points in it - one right after the other. When I changed the value of the second point, this resolved the problem of exporting the dwg file. It seems to be some kind of problem with creating a spline curve, where two points are the same. We will implement a fix in the near future that will prevent this problem from occurring.
