Problem with Hydraflow Hydrographs Extension Civil 3D 2011 e 2012

[Anonymous]

I was wondering if anybody are experiencing problems with Hydrographs lately.  I am able to create a new model, working on it, input data, save it, etc, but let's say if you try opening after saving it, the model cannot be opened anymore.  If you open an old model, and then edit it and save it, same problem happens when you try reopening it.  Even if you just save as, it saves it, and you can work and edit the model.  But once closed, it cannot be reopened anymore.

I tried in three different computers, I even reinstalled Civil 3D 2012, and the problem persists. 

Has anybody experienced any problems such as this lately?

Thanks.