Invoice Days are not calculating when a Days limit exists.

Question

Hello,
We are having an issue with both our Customer and Vendor invoices.
When using a 'payment term' with a 'Days limit' the Due date is not calculating at all.  The 'Days' field in the 'Payment tab' just comes up as a blank.
This functionality used to work, something must have changed in the system.
This is how I have the Payment term setup.
ZY87 (days limit 10).  120 days invoice date (10th & 25th)
Default for Baseline Date = Document Date
Fixed Date = 10, Additional months = 4
ZY87 (days limit 25)  120 days invoice date (10th & 25th)
Default for Baseline date = Document Date
Fixed Date = 25, Additional months = 4.
When I choose this payment term in the invoice, I get no value to show up in the 'Days' box and when I save it, the Due date becomes the Baseline Date.
Any idea why?
thanks for your help!
Brett

Answer 1

Thanks for your immediate response.
i have maintained all the ticks for the counting rule for LOP absence type. but in the infotype it still shows 22 days instead of 31 days for the month of oct.
Regards,
MVN