I have tried running the flow direction / fill / flow accumulation tool several times for layer nav_dem_10m , but it always shows the following error. In fact, no tool is succeeding under hydrology tools (spatial analyst) except basin and shows almost same error for each tool I run.
But whenever I run the layer valmeyer_dem_10m for flow direction or any tools under the hydrology toolset, every tool runs perfectly and obviously with no error. I have tried changing the raster format of layer nav_dem_10m into grid, .tiff, etc. But those also don't help. Flowing SS is for valmeyer_dem_10m
duplicate of
https://community.esri.com/thread/258651-arcgis-error-999999-error-executing-function