This study has been designed as a Phase I, open-label, dose finding study with a dose escalation part and a dose expansion part in adult patients with selected advanced solid tumors. The study treatment, TNO155, will be taken until the patient experiences unacceptable toxicity, progressive disease and/or treatment is discontinued at the discretion of the investigator or the patient or due to withdrawal of consent. Some patients will be participating in a food effect investigation as an exploratory objective.