Need table name where all the user roles are stored.

Hi Gurus,

This is a BW issue which is related with SAP Security too.So I am posting this.

Its a astonishing incident to me.User reported that he is not able to see his roles.He is not able to save a workbook in his roles.Roles are "vanished".Even I tried with his credentials.But same issue.When we checked with Basis, he has got authorisations.

Any idea why is it happening? Any one have this kinda experience??

I thought to know if there is a table which has all user roles so that we can do the investigation in this view.

Thanks

James