in a Filler infopath form its is needed have to copy data from excel sheet then paste it in s rich box in the infopath form. when we try to click a button to validate the data, the click event does not fire from the first click, so we have to click on it twice to validate the data.
it works from the first time only in two cases when we choose merge formatting while pasting the data from the excel sheet or if we are pasting small data.
please note that it is not web based