Importing AutoCAD 3D model into Revit MEP 2014

[aandrews489526]

When importing my 3D model from AutoCAD into Revit MEP 2014, my model is coming in disjointed. They are calling it a "TIN" Triangular Irregular Network model. This has never happened in the past and we have changed nothing in regards to the way we import. Is there a setting that can be changed to fix this problem?

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[tfullerpipes]

What is your process? It appears you are using a 3rd-Party add-in for ACAD.

[aandrews489526]

We use Hydratec in conjunction with AutoCAD to design the Fire Protection systems.

[mattbenimble]

When you say "Nothing has changed" what does that include?

Have you changed:
-HydraCAD Versions?
-Revit Versions?
-Models?
-New Families?
-Origin Points?