Study of RAS(ON) Inhibitors in Patients With Gastrointestinal Solid Tumors

Inclusion Criteria: All Patients (unless otherwise noted): * ≥ 18 years of age * ECOG PS is 0 to 1Performance status * Adequate organ function as outlined by the study * Pathologically or cytologically documented pancreatic carcinoma or poorly differentiated pancreatic carcinoma with metastatic disease or RAS-mutated, histologically or cytologically confirmed colorectal adenocarcinoma with documented unresectable or metastatic disease (Subprotocol A, B, C and G) * Presence of RAS G12D mutation (Subprotocol D, E, F, G) Exclusion Criteria: All Patients: * Primary central nervous system (CNS) tumors * Impaired gastrointestinal (GI) function that may significantly alter the absorption of RMC drugs * Major surgery within 28 days of first dose Other inclusion/exclusion criteria may apply.