Convert the solid to a sheet body.
1.In the
Modeling Preferences dialog box, on the General page, in the
Body Type group, select
Sheet. and click OK.
2.
the solid body you just created.
3.Make any change in the dialog box, and then change it back. (For example, clear the
Normal to End Sections check box, and the select it.)
4. In the Through Curves dialog box, click OK.
Note:
This ability to change the solid to a sheet and vice versa applies to all curve mesh and swept surfaces.