Execute vo query once in a page/region

Hi OAF Experts,
I have a region that executes a VO at processRequest. Now, when I navigate to the next page OR click a subtab to take me to another region (the other region from the subtab has its own controller), the VO is re-executed when I go back to the same region. I only want to execute the vo ONCE when it is called from a source page (the source page in this regards is the Hierarchy Page from HR). How do I do this? It seems that PPR is the answer but I cannot find any example anywhere. Can someone please help shed light on this? Is there any sample code that I can also look at?
Thank you very much.

use if(!vo.isPreparedForExecution()) {vo.executeQuery()}

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    Martin

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    Macromedia Certified Dreamweaver Developer
    Adobe Community Expert (DW) ::
    http://www.adobe.com/communities/experts/
    "Coldfusionstudent" <[email protected]>
    wrote in message
    news:[email protected]...
    >I am getting this error.
    > 12:40:54.054 - Database Exception - in
    >
    C:\CFusionMX7\wwwroot\Author\dropdown2\EmployeeAddAction.cfm : line
    26
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    >
    > i have added extra fields in the mdb and added extra
    code to the form page
    > and
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    > i am getting this error still.
    > this is how i broke it down.
    >
    > If I run my 2 files EmployeeAddForm.cfm and
    EmployeeAddAction.cfm
    > I get this error:
    >
    > The web site you are accessing has experienced an
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    >
    > The following information is meant for the website
    developer for debugging
    > purposes.
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    > Error Executing Database Query.
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    > of errors. In the Administrator, click Debugging &
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    > correct
    > syntax.
    > Search the Knowledge Base to find a solution to your
    problem.
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    > required="Yes"
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    > maxlength="11">
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    >
    > <tr>
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    > <td>
    > <cfinput type="Text"
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    > size="22"
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    >
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    > <td>Last Name</td>
    > <td>
    > <cfinput type="Text"
    > name="Lastname"
    > message="Please enter the employee's last name."
    > required="Yes"
    > size="22"
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    >
    > <tr>
    > <td>Salary</td>
    > <td>
    > <cfinput type="Text"
    > name="Salary"
    > message="Please enter a valid salary."
    > validate="float"
    > required="Yes"
    > size="22"
    > maxlength="20">
    > </td>
    > </tr>
    >
    > <tr>
    > <td>DOB</td>
    > <td>
    > <cfinput type="Text"
    > name="DateOfBirth"
    > message="Please enter a valid date of birth in the
    format mm/dd/yyyy"
    > validate="date"
    > required="Yes"
    > size="11"
    > maxlength="10">
    > </td>
    > </tr><!-------------
    > <tr>
    > <td>device_typ</td>
    > <td>
    > <cfinput type="Text"
    > name="device_typ"
    > message="Please enter the employee's device_typ."
    > required="Yes"
    > size="22"
    > maxlength="20">
    > </td>
    > </tr><tr>
    > <td>device_Email</td>
    > <td>
    > <cfinput type="Text"
    > name="device_Email"
    > message="Please enter the employee's device_Email."
    > required="Yes"
    > size="22"
    > maxlength="20">
    > </td>
    > </tr><tr>
    > <td>Work_email</td>
    > <td>
    > <cfinput type="Text"
    > name="Work_email"
    > message="Please enter the employee's Work_email."
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    > size="22"
    > maxlength="20">
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    > </tr><tr>
    > <td>Pin_Number</td>
    > <td>
    > <cfinput type="Text"
    > name="Pin_Number"
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    > </tr>------------------>
    > <tr>
    > <td> </td>
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    > </tr>
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    > </cfform>
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    > Lastname,
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    > device_typ,
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    > Work_email,
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    > )
    > VALUES (
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    > </cfquery>
    >
    > <cfmail
    to="#Form.Firstname#.#Form.Lastname#@somewhere.com"
    > from="[email protected]"
    > subject="Welcome to your new company!">
    > Welcome to your new company, #Form.Firstname#
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    > <!----
    > <cflocation url="EmployeeList.cfm">----->
    >

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