Workaround:
Select the RAS Geometry | Layer Setup menu item.
Click on the Optional Tables menu item. Select the
“Nodes Table” in the “Node Table” list box after the
error is listed. Press Ok to save the changes and
proceed.
We have updated the HEC-GeoRAS 10.0
installation package to fix this issue. Uninstall
the old HEC-GeoRAS 10,
re-download it,
and then install the new installation package.
Anything downloaded on
05 Oct 2011 be the fixed version (10.0.25).