org.openqa.selenium.ElementNotVisibleException is occure even though the element is visible

org.openqa.selenium.ElementNotVisibleException is occure even though the
element is visible

org.openqa.selenium.ElementNotVisibleException is occuring even though the
element is visible.
I am find an element using xpath and sending data in the field by using
send keys. This is done to all the fields in the form.But , when control
comes to specific field , it throws this error . validated Xpath, it is
correct.Element is not added dynamically(input/text box)