I'm working on a flood inundation project as my research study of my course. I am now assigning XS Cut Line Attribute (after constructing the XS Cut Lines) in HEC-Georas > RAS Geometry > XS Cut Lines Attribute > ALL :: (All Cross-Section Tools). Upon the pop-up of the All Cross-Section Window it appears like the picture below.
But when I enter "OK" button, an error occurs
and I enter again, the error looks like this:
Here is the screenshot of my project.