Tracing Error Message to Program

Dear All,

When I am executing standard transaction MIGO in SAP, I have a customised error message appearing.

Now I want to eactly navigate to the location of the error message in the program to check for the error.

But when I click the error message it gives like ZMM193 as message class and when I try to navigate and fins where used list, it gives only list of programs where message class ZMM is used.(Which runs into many includes / BADI's).

How do I exactly get into the place in the program where this message(ZMM193) is used?

Kindly suggest.

Thanx

Shyam.