I've been trying to run a viewshed analysis in ArcGIS 10.1 and everytime I've tried running it, it crashes the whole program, with no error. See the image below.
I've made sure it has OFFSETA field in right format, that it is one point only in the shapefile, and also that 3D analyst is ticked on.
Additionally I have also tried to run it as a Python script but it still produced the same result.
The elevation and XY distances are the same unit, in metres, though I haven't specified metres in the OFFSETA column. My input layers are a DSM raster that is quite big (85000x85000 roughly, 27.23 GB), and a point layer that is one point only. They are both in British National Grid projection. Im using ArcGIS 10.1 SP 1