Navision pricing

when using navision prices on an inventory item i am using an end date for one price and a start date for a new price, when i run the MRP or Req worksheet it does not pick up the new price for future orders. should it pick up the new price or does this only work when creating a purchase order

Hi Dave It seems to work fine in version 4.0. Is the default vendor on the item card the same vendor being referenced with the vendor pricing?