I have followed these steps exactly many times over. I get to this step and hit the Orthorectify button and the temporary Ortho layer is created but I can't see it (even after turning the other layers off). I then try to export it in hopes of creating a permanent layer that can then be imported. I select the new Ortho layer and hit the export button in the Image Analysis window, direct the file to be saved to my working folder, give it a name, and keep the default settings the same (settings being: Extent-Raster Dataset, Spatial Reference-Raster Dataset, Cell Size-0.5 by 0.5, Format-TIFF, Compression Type-NONE). Upon hitting save, essentially nothing happens. The program gets stuck in a loop (trying to save for hours on end) at this point and eventually crashes without creating a new file. No error messages.