DEM Reconditioning tool doesn't recognize input Raster

Discussion created by thf999 on Jun 2, 2011
Latest reply on Mar 19, 2012 by MBoucher21

When I used DEM Reconditioning tool from Arc hydro toolbox , it doesn't recognize any input raw DEM selected from drop-down list. The error message is "error 000840: The value is not a String". But if I used the same function by selecting  from toolbar, it run properly.  I tried other tools in the toolbox  such as  Level DEM, Fill Sinks,  they allowed to select raw raster from drop-down list and run well.

Does someone  know what wrong with me?