COBEC0050I <opt> is not valid in CALL on mainframe
The <opt> keyword in the CALL statement is a Micro Focus extension which will be invalid on the mainframe. It is accepted and supported in the MCOv3 system.
COBEC0051S Command Option expected, found <opt>
An argument (i.e. text enclosed in parentheses) or an alphanumeric literal was found where an option identifier is required in the EXEC CICS statement.