>I have a temporary table existing. No index on it. When I try to do a USE on it, I got the error message 1707...
>
>Structural .CDX file is not found (Error 1707)
>The structural index file associated with a table file could not be found.
>
>
>I don't understand why I got this when the table has no index?

Exactly for that reason. The header of the table indicates that table has the Structural index.