Hello Sandeep,
Did you check the feeder class CL_FITV_POWL_TRIPS_TOBEAPPROVE and method IF_POWL_FEEDER~GET_OBJECTS. This method gives the list of trip in the managers queue.
Please try to debug this class method.
There are many different classes also available. Please check in the package PTRM_WEB. In this go to Embedded Packages-->PTRM_WEB_POWL-->CLASS LIBRARY-->Classes.
In this you will find different classes.