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I have two raster DEMs in tif format. They both have the same cell size and spatial reference. I want to subtract the elevation from the 2nd picture from that of the same area in the 1st picture. When i try and minus one raster from the other to obtain elevation difference between them, i get the error code 999999. This is generic and doesn't help me with what i am doing wrong. I have also tried raster calculator but this brings up error code 000539. I thought the issue was that the 1st picture wasnt clipped to the size of the 2nd but when i clip it, it for some reason does not follow the outlibne of the raster in the 2nd picture. I am sure there is a simple solution but one that I cannot put my finger on.

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    Can you add a screenshot of the tool, how did you define the inputs and outputs. Did you specify the output raster with (.tif) extension? – Moh Jul 14 '18 at 14:58
  • A longshot...I see in your path you use a "." (point) in the first path. Try moving the first raster to a new path, maybe a shorter one...I have found working with Rasters with spaces, characters and long text in the path name buggy in Arc...<EDIT> The text in question is "2017.1", another note...Arc doesnt like file names longer than 13 characters...try a shorter name as well... – Keagan Allan Jul 16 '18 at 2:53

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