issue is OVS help

Dear Friends,

for one of the field, i have created ovs help ,

the scenario is if i have data in internal table( IT_ENAME), it should display in the list , if the itab( IT_ENAME) has no rows , it  should display an error message , it should not display list table

so  if my itab is initial.

i am by passing  the below method

i_ovs_data-m_ovs_callback_object->set_output_table(    output       = IT_ENAME       ). but i am getting the following dump

Could any one help me, how to display the error message

Thanks

Vijaya