Preheat oven to 350 deg F.

Beat butter and sugars at medium speed with an electric mixer until creamy. Add eggs and vanilla, beating well.

Combine flour, baking soda, and salt; add to butter mixture, mixing well. Stir in oats, chocolate chunks and pecans. Drop by rounded tablespoonfuls onto ungreased baking sheets.

Bake at 350 deg F for 9 minutes or until golden. Cool slightly on baking sheets; transfer to wire racks to cool completely.