Installing Enterprise COBOL
If you haven't already done so, install the compiler; see the Program Directory for Enterprise COBOL. (Get the Program Directory for Enterprise COBOL from the Enterprise COBOL for z/OS® library.)
Be sure to customize the Enterprise COBOL default compiler options prior to using the new compiler, based on the default options of your prior compiler version. For instructions, see Planning to customize Enterprise COBOL in the Enterprise COBOL for z/OS Customization Guide.