BAPI_PO_CREATE1 AND ME 078 with specific delivery date

Hi all,

I have strange problem with BAPI_PO_CREATE1.

When I post a PO with delivery date = today i get ME 078 message "Delivery date outside period covered by factory calendar". With delivery date = tommorrow the problem doesn't exist and I can post PO.

When I created PO by me21n I was allowed to enter both delivery dates.

why why why?

regards.

wojtek