How To Link The Two Reports Together

On the sub report query click on the prompts button: 

Create a new prompt:

Create the SQL query from the prompt:

begin

 if (@__filterwildcard = '')

  select distinct Name0 from v_R_System WHERE isnull(Obsolete0,0)<>1 order by Name0

 else

  select distinct Name0 from v_R_System

  WHERE Name0 like @__filterwildcard

 and isnull(Obsolete0,0)<>1 order by Name0

end

Create a link on the main report linking it to the sub report.