Unable to book the sales order. "Item and UOM not available in the pricelist"

 Hi,

I am unable to add the item in the sales order line. Getting the error as "Item and UOm not available in the pricelist". The item is available woth the same UOM and the pricelist is effective.

I have entered the selling price directly in the pricelist but have added some pricing attributes (user entered type).These pricing attributes have been stored just for reference and not used for calculation. with the attributes defined the item is not getting added to the sales order line. If there is no attribute for the item then the item is getting added to the sales order.