1. Women who are pregnant, breastfeeding, or have child-bearing potential and are unwilling/unable to use an acceptable method of contraception for the entire study period and for at least 4 weeks after cessation of the study drugs. All women of child-bearing potential must have a negative pregnancy test prior to first receiving protocol therapy. If the pregnancy test is positive, the patient must not receive dasatinib or erlotinib, and must not be enrolled on the study