I'm using the Infrastructure Design Suite 2013, with Civil 3D and Navisworks Simulate and the required Civil 3D 2013 object enabler. Everything is 64-bit. I can load DWG files with 3D content just fine, but as soon as I try to load any file with a surface, I get a series of fatal errors:
FATAL ERROR: Unable to load file 'AcTcUiRes.dll". The specified module could not be found. Press OK to abort.
... followed by...
acui19res.dll not found
... folloed by ...
AnavRes.dll not found
If I use NWCOUT and save the file in NWC format, it imports fine. Any suggestions appreciated.