How to find T-code History with role

Hi Experts,

I am facing one critical issue. One user was having access of one T-code but suddenly he is getting message that he is not authorized for that T-code. I have checked any change for his user id but no changes has been done. Even When I am searching the roles of that particular T-code from SUIM, I am not getting role name. I have checked from ST03N last month history, that t-code was accessed by him.

Please advise how to find out that from which role user has accessed this t-code ? Please help as this is critical requirement for me.

Thanks in advance !

Regards,

Lokesh Bajaj