On calling the wind generator for a selected 2D frame.
The 2D structure is not a closed contour (besides the supports). Somewhere in the selection of two or more bars are not properly connected.
- Zoom in a couple of times at different points of the selected 2D structure and the cause will be visible.
- Modify the structure in the window geometry manually, or use the ‘Structure verification‘ function. This function will merge points that are closer together than a specified tolerance.
- Check the model accuracy. (when merging points, the boundary conditions and supports of these items may have been removed)