A bug was discovered in RAM Concept 6.0.1 that, while very rare, causes a surface load to be ignored in the analysis. This bug is fixed in version 6.1.0 (release notes are available here). The condition in which this happens is with surface load polygons shaped like the one below.
If points 1 and 2 are located as shown in the sketch below, the entire load polygon will be excluded from the analysis.
The magnitude of the dimension Very Small Distance is on the order of 0.01" (0.25 mm) or less. The defect manifests only if both point 1 and point 2 are within Very Small Distance of the adjacent segment, and do not lie directly on the segment.
The program does give a coincidental indication that something is wrong. The hatching within the surface load polygon is only shown within a portion of the polygon.