This is a phase 1 open-label sequential-group study of ascending single and multiple oral doses administered to subjects with advanced solid tumors. Each subject will participate in only 1 dose group and will receive a single dose of test article, followed by a 1-week observation period, and then will receive the test article administered once-daily by mouth in cycles consisting of 28 days. Subjects will be enrolled in groups of 3 to 6. Adverse events and dose-limiting toxicities will be assessed from the first single dose.