How to create breakpoint with ABAP code?

Hi all,

I would like to create a breakpoint for my user id only.

So far, the only way that I know is by:

break <user_id>.

e.g.

break john.

HOWEVER, my user id contain a "." (i.e. chris.p) , and this cause syntax error.

Could anyone help me?

Thank you.

Best regards,

Chris