OAF form validation errors

Hi,

We have an issue in OAF page.

Navigation is as follows:

Employee Self service - >create absence → absence type → start date→ end date →calculate duration - > replacement person → exit permission

but the problem here is after entering start and end date we need to click on the calculation duration to get the no of absence days.

But here we are getting an error stating that we have to enter replacement person and exit permission fields before calculating the duration as these two are mandatory fileds.

what is happening is:

absence type → start date → end date - > replacement person → exit permission → calculate duration