F.05 not showing the exchange rate from OB08

Hi all,

I've been browsing through all previous posts to look for a solution, but no luck.

Our company has been using F.05 for more than 10 years for forex valuation.

For last two months F.05 is not showing any exchange difference, inspite of updating OB08 on a daily basis with the new exchange rate (Rate have been changing a lot)

Below screen shot shows the first exchange difference column as blank.

Appreciate if someone can offer a solution. I'm baffled as to why this has happenned on its own.

Regards,

Kumar