I have road data that I've downloaded from the National Transportation Data set for 4 states. I've merged these datasets, clipped them to a watershed shape, and projected the new data to NAD_1983_UTM_Zone_18N. To run Euclidean distance, I set the output cell size to 50m, and changed the environment settings to my watershed area as the processing extent and raster analysis mask. I left the max distance empty.
I disabled the background geoprocessing and made sure there are no '.gbd' in the path I'm using. I keep getting the error message 999999 almost immediately and I'm not sure why.
There was a previous post about this error and tried to follow the solution, but I am still getting errors.