org.openqa.selenium.NoSuchElementException: Unable to find element with xpath == //table[@id='groupActions']/tbody/tr/td/button[@title='GDelYesButton']

driver.switchTo().alert();

<p:commandButton id="delete"
                     action="MBeanPath"
                     icon="ui-icon ui-icon-trash"
                     value="Delete"
                     title="GDeleteButton">
        <p:confirm header="Delete Record"
                   message="Are you sure about deleting this record?"
                   icon="ui-icon-alert"/>
    </p:commandButton>

<p:confirmDialog global="true" showEffect="fade">
    <p:commandButton title="GDelYesButton" value="Yes" styleClass="ui-confirmdialog-yes"/>
    <p:commandButton title="GDelNoButton" value="No" styleClass="ui-confirmdialog-no" />
</p:confirmDialog>

package test.selenium;

import java.awt.Robot;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import org.openqa.selenium.Alert;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.support.ui.ExpectedCondition;
import org.openqa.selenium.support.ui.Select;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;


public class DeleteTestNG {
    WebDriver driver;

    public Alert getCurrentAlert(){
        return driver.switchTo().alert();
    }

    public DeleteTestNG() {
    }

    /**
     * @throws java.lang.Exception
     */
    @BeforeTest
    public void setUp() throws Exception {
        // Use Internet Explorer and set driver;
        System.setProperty("webdriver.ie.driver","path");
        driver = new InternetExplorerDriver();

        // And now use this to visit URL
        driver.get("pageURL");
    }

    /**
     * @throws java.lang.Exception
     */
    @AfterTest
    public void tearDown() throws Exception {
        driver.close();
    }

    @Test
    public final void test() {
        final WebElement formElement = driver.findElement(By.id("searchForm"));
        final Select drpHaulierelement = new Select(formElement.findElement(By.id("data_input")));



        /*
         * List<WebElement> options = drpelement.getOptions(); for
         * (WebElement e : options) { System.out.println("Option " +
         * e.getText()); }
         */
        drpelement.selectByIndex(0);

        // Now submit the form. WebDriver will find the form for us from the
        // element
        final WebElement submit = driver.findElement(By.id("Submit"));
        submit.click();
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            System.out.println("Caught");
        }

        // Test Search results
        final WebElement tableElement = driver.findElement(By.id("data_input_data"));
        System.out.println("Data Table child - " + tableElement.getText());
        final WebElement chkBoxElement1 = tableElement.findElement(By.xpath("//tbody[@id='data_input_data']/tr/td/div/div[2]"));
        System.out.println("chkBoxElement1 " + chkBoxElement1.getTagName()+ "--" + chkBoxElement1.getText());
        chkBoxElement1.click();

        final WebElement chkBoxElement2 = tableElement.findElement(By.xpath("//tbody[@id='data_input_data']/tr[2]/td/div/div[2]"));
        System.out.println("chkBoxElement2 " + chkBoxElement2.getTagName()+ "--" + chkBoxElement2.getText());
        chkBoxElement2.click();

        final WebElement gDeleteButton = tableElement.findElement(By.xpath("//table[@id='groupActions']/tbody/tr/td/button[@title='GDeleteButton']"));
        System.out.println("gDeleteButton " + gDeleteButton.getTagName() + "--"+ gDeleteButton.getText() + "--"+ gDeleteButton.getCssValue("title"));
        gDeleteButton.click();


        //driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            System.out.println("Caught");
        }
        //driver.switchTo().alert();
        //driver.switchTo().activeElement();
        //driver.switchTo().alert();
        final WebElement yesButtonElement = tableElement.findElement(By.xpath("//table[@id='groupActions']/tbody/tr/td/button[@title='GDelYesButton']"));
        System.out.println("yesButtonElement " + yesButtonElement.getTagName()+ "--" + yesButtonElement.getText());
        yesButtonElement.submit();
    }

}