I had a problem recently where I couldn’t import borehole data using the Geotechnical tools in Civil 3D 2015.When I attempted to import borehole data I had the message ‘Unable to Connect to Database’.
It seems if you have Civil 3D 2015 installed as part of the Infrastructure Design Suite, one or more of the Map 3D service packs are causing problems. I uninstalled Map 3D Service Pack 1 and 2 and the problem went away.
I appreciate this is only a temporary fix so I will update my blog when I have a better solution.
by Graham Riddleston