how to pass a variable value in message area

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hi

i have a requirement in which i need to display a table with records and below it in a message area i need to display the total no. of records found ( eg : 2 records found )

am using message manager for the display and calculating the total no of rows by lv_index = LINES( li_table ) .

get message manager

DATA lo_api_controller TYPE REF TO if_wd_controller.

DATA lo_message_manager TYPE REF TO if_wd_message_manager.

lv_index = LINES( li_table ).

lo_api_controller ?= wd_this->wd_get_api( ).

CALL METHOD lo_api_controller->get_message_manager

RECEIVING

message_manager = lo_message_manager

.

report message

CALL METHOD lo_message_manager->report_warning

EXPORTING

message_text = '& records found' WITH lv_index

.

BUT this throws an error. ... can anyone please provide the correct coding for this.

Thanks

Anurupa.