Trial of Erlotinib and BKM120 in Patients With Advanced Non Small Cell Lung Cancer Previously Sensitive to Erlotinib

BKM120 and Erlotinib will be given once daily. Erlotinib 100 mg PO will be administered. During Cycle 1-Week 1 all patients will receive 80 mg PO daily BKM120. After the first week of Cycle 1, the dose of BKM120 will escalate to 100 mg PO daily and treatment will continue as long as there are no unexpected or prohibitive toxicities, or disease progression.