Phase 1 will be a dose escalation of doses 70 mg/m2 to 300 mg/m2 divided into 6 cohorts. Each patient will be assigned to a single cohort with no intrapatient dose escalation. Patients will received gemcitabine on days 1, 8, and 15 followed by LY2603618 on days 2, 9, and 16 of each 28 day cycle. The phase 1 portion will enroll approximately 26 patients total to determine the maximum tolerated dose to be carried into the phase 2 portion of the study.