R3482 - Generation start date

We run R3482 daily net change and weekly full gen from the scheduler. The generation start date on the Horizon tab has always been blank for the 2 versions. It seems someone has entered a date in both versions and I can't seem to blank them out. I get an error "There are errors on the following pages: Horizon. Please correct the errors. Any idea how to force a blank date into these processing options?

TIA

Hi
I'm not getting the message .Can you explain more on the error message part and also steps you'd carried out to change the PO value.

Regards
Thiru

I had the same issue JDE 8.10. I cant blank this processing option.. Error - there are errors on following pages: Horizon.

However, I was typing blanks there. All you do is backspace and clear all the spaces to keep null value and the error message will go.

Thanks