sfm::reconstruct() - How to troubleshoot when outputs nothing

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I have generated successful models from reconstruct() using my visual C++ setup. But for models I try to generate it runs for awhile and outputs nothing. In other cases it outputs a model with some of the views / camera's missing. Maybe I have a couple of not so good keypoints out of the many thousands I am feeding it or lack of tracks bridging from one set of views to another. So my question is: Does anybody have ideas for how to troubleshoot when reconstruct() runs but bad output? Do I need to setup glog to view the Ceres solver (not sure how to do that)? Would the log file give a clue when there is trouble? Any ideas would be appreciated. Thanks