Bringing Family after Visit Visa

Hi All,
        I am living in Muscat for past 18 months and i am planning to bring my wife on visit visa. During this period (3 months) i am planning to arrange all the necessary documents for Family Joining Visa.

    My question is , Can I bring my wife immediately once she makes an exit (visit visa) or is there any rule that we have to wait some period before she can make an entry with Family visa?

   Thanks in advance.

You can bring her immediately