I don't do much work with Calibre/Cadence integration, but I can point you to where I'm looking for information: Appendix A of the Calibre Interactive User's Manual. I don't see the term "Cadence IC" in it, so I am guessing you are using Encounter.
The first thing I would suggest is checking the transcript. If I recall correctly, Calibre Interactive has it in its own pane -- you get there by clicking a button that is in the column on the left. Errors and warnings are also printed to their own area in the pane, but it isn't perfect; may also want to eyeball the log.
To see if the problem is just in LVS, you could try running in a mode that does not require it. In the Netlist tab (where you set "CalibreView") , set "Use Names From" to LAYOUT. If you are starting from the layout window, this should work even if LVS is broken.
The last thing that occurs to me is that the newer versions of the Calibre Interactive manual mention that Cadence Encounter has settings for GDS export. I don't know if the standard menus in v2010.1 include a Calibre > Setup selection, the way they do in newer versions. You may have to do some TCL programming. This would be in the Cadence docs, though.