validation error document attachment mandatory when days equal to 1 but not giving error

Hi,

We have an issue in OAF page.

Navigation is as follows:

Employee Self service - >Apply absence → absence type → start date→ end date →calculate duration - > add attachment

but the problem here is after entering Sick absence and 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 validation error document attachment mandatory when days equal to 1 but not giving error when days more than one

{removed by admin}

Attached is the screen shot error.

we need to have a correct sequence a