Return value of sp inside calling sp

I am running SQL 2008R2 and have a stored procedure that does several steps and updating different tables.  I want to run another sp inside this sp and grab the value returned by the Output parameter.  I have tried using below in my sp but it does not work.  Any suggestions?

DECLARE @NewLineID int;

SET @NewLineID=(exec dbo.ms_insRepairOrderLinesDup@LineID=@LineID, @NewLineID=0)