EQA4091W The version of the z/OS® Debugger SVC installed on the system does not support STEP processing for GO programs. The installed version is `installed_version`. The required version is `required_version`. STEP will be disabled for this debug session.

Explanation
Version 20 or higher of the z/OS Debugger SVC
must be active to allow STEP processing for GO programs.

Programmer response
Contact your systems programmer to ensure the correct SVC       
version is activated.