Hi sorry for my late response, I came back to skyline and still unsuccessful running skyline!
I've converted raster to TIN, files are on PC not on a network. Raster format in Tiff. File name is unique and can be opened in ArcMap.Also have a viewpoint above the surface.
Was wondering if you could send me a sample terrain +viewpoint which I can test Skyline and find my problem.
Appreciate your attention and help
Ata