Assign stream slope runs forever, does nothing

Discussion created by garyhubbs on Aug 12, 2010
Latest reply on Feb 17, 2015 by dan.wismer
Following the ArcHydro tutorial, I am able to successfully complete step 1 (Level DEM) and step 2(DEM Reconditioning), but when I get to step 3 (Assign Stream Slope) the process just runs forever (well, all night at least) and does nothing, does not generate any error messages !!!

What could be wrong ?  I've checked the Input Stream Layer and all lines are digitzed correctly (run downhill) as I thought that might be the problem.
Perhaps the DEM is too large ?
Perhaps something wrong with the Input Stream Layer structure (the rivers are interrupted by many lakes) ?