Recently I have experienced a few problems with ArcGIS 10, so I switched back to 9.3, thinking that my live will be back to normal ... and it is not.
I am using at the time tool made by Venkatesh Merwade, producing river batymetry with sections - great tool by the way.
When I realized that the tool will not work under 10, I switched back to 9.3, so I could work. And it turns out that now when I try to use it under 9.3 I receive an error HRESULT E_FAIL
Would anyone know whats wrong?