If you created a model in Etabs using AutoCAD, this will probably create some
problems which will lead to delay in running the model. This is because the
start and end points of a line for instance, have different coordinates: start
point of L1 is x=1.0012, y=51.012 and end point is x=1.0000, y=51.000. The
fastest solution is to save the model as *.e2k and import it again, this
solution applies only for models created using the same versions.Also,
“Overkill” command in AutoCAD will eliminate this kind of errors (cleaning up
the DXF)