could not open relation:no such file or directory

["karthik" <karthik.nandagiri@xxxxxxxxx>]

hello,

    my name is karthik .

     i facing a problem when trying to select values from a table in
postgresql.

   when i execute a query like "select title from itemsbytitle;"   i
get error as

   Error:Could not open relation "itemsbytitle". no such file or
directory.

   can anybody help me to find an answer for this problem.