>I open the first table (First Database is opened)
>USE C:\FOLDER111\CLIENTS
>
>I append from a second table (Second Database is opened)
>APPEND FROM C:\FOLDER222\ADDRESSES
>
>Question:
>Why is the second database open after the append? The second table was closed. Is this done by design or is this a bug?

Any time you open a table that is a member of a DBC, the DBC is implicitly opened. The exception to this is if you access the table via ODBC. This is by design.