If you open your workspace in a text editor like Notepad, you will see the recommended command line to run the workspace in the first several lines. You can use this command line in your batch file.
Make sure to replace the paths and parameters with the correct ones for your specific workspace and needs. If you could share the content of your .bat file (obscuring any sensitive information), I could provide more specific help.
thank you for your return just I join you the beginning of script which I made. I manage to launch it but not to execute it, is it the .exe which causes the execution of the processing chain?