If you have selected the checkbox for "only calculation surfaces" in the calculation settings and calculated the project, you may not get results for all the calculation surfaces. In the results overview, this is illustrated with cross bars "-".
This is an absolutely correct behavior, since only results for perpendicular, adaptive illuminances can be output, in so far as the above-mentioned checkbox has been activated. So to sum up, all calculation surfaces / points which have not received the calculation parameter "adaptive" are not calculated.
At present our calculation kernel can only calculate the method as described. However, we will adapt this behavior in the future and output results for all calculation areas / points.