I am a little confused by your question. Looks like this table is already in the DBC you are trying to add it to. If that is not the case, you may need to try to remove it first:

CLOSE ALL
OPEN DATABASE c:\pcs\pmis EXCLUSIVE
REMOVE TABLE mytable
VALIDATE DATABASE RECOVER
*!* The next line is to see if any backlink
*!* error comes up. if so remove it.
USE MyTable EXCLUSIVE
USE
ADD TABLE MyTable

>I am trying to add a table from different dataset.
> to this database(c:\pcs\pmis.dbc) while doing that i am getting a message.
>
>Cannot add this table it belongs to database c:\pcs\pmis.dbc
>
>where is that path mentioned and how can i correct it.
>
>
>Thank you very much.