Use an unmodified assembler driver
If you cannot (or do not want to) modify the non-COBOL driver, you can use the unmodified driver while specifying the Language Environment® RTEREUS runtime option. (RTEREUS initializes the runtime environment for reusability when the first COBOL program is invoked.)
Important: RTEREUS is not recommended for all applications; in some instances, it exhibits undesirable behavior. Before using RTEREUS, thoroughly explore the possible side effects and understand the impact on your application.