Hello Sephe, I have the same problem than Sovan. I have checked there is a CUDA GPU and set the Tdr delay to 60 as recommended in the tool-help. First Error-Message was a litte different. After setting a vertical coordinate system to the observer points it is just the same as above. But I´am failing in advising a vertical coordinate system to the input raster-DEM. Any ideas how to do this? I hope this will solve the problem. @Jim - there is more than 30GB free space on the temp drive, and the error comes just after starting the tool. I doubt there is any connecting, because i am testing with reduced resolution and simplified data. Thank you Hartmut
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