It is useful to note that trimming a wall to a roof using the SEO - Solid Element Operation is a cumbersome way to trim a wall.
You should know that the command to trim a wall to a roof has existed for a long time, prior to SEO, and can easily be undone from within that particular wall element's dialog box. Select the wall(s) you wish to trim and they will automatically sense the roof above or below..... see attached for starting command.
I think this old way is easier to manage than SEO and doesn't needlessly add to the gross number of SEO's in a file that some users notice can become unreliable.
Dwight Atkinson