Comment 2 for bug 918283

Vitor, yes, that's correct. Currently, you select exposure assets from the input model, filtering on the region of interest. The problem is, if you define a list of sites (instead of a region/polygon), the risk engine does not support this.

The risk engine is currently to assume that ALL calculations are on a region/polygon, not on a list of sites. If you run hazard only, you can specify a region or a list of sites; that works. When you throw risk into the mix, it breaks.