Hello, unfortunately I was unable to go through this step and I have not found where the problem was, moreover its all data provided by the developer and I have not changed anything as I wanted to firstly run the model just on provided data. When I tried with my own data I was unable to go through either. I tried to create the layer in hecras (in mapper) and it worked. However, during data processing I've decided to use 1-D model so I did not use the layer in the end.