Workflows triggering one after another

HI ALl,

Ia m working on a support project.

A a flex workflow is triggering from MV45AFZZ.After flex workflow a Customer workflow is triggering from MV45AFZZ only without manual intervention.

When i verified flex workflow, there is no subworkflow exists niether there is direct call from one of the method in flex workflow nor there exist SWE_EVENT_CREATE or BDC.

Cab anybody explain how is it possible that MV45AFZZ getting called again for Customer workflow?

Thanks,

SD