I have and I have deducted its highly unlikely that both Barcelona and Real have never played each other in the past 5 years, especially considering both teams usually go really far.
Considering the amount of corruption there is at Fifa, who is to say Uefa doesn't have any either?
Seriously though, we've had two Bayern vs Real Games, two Bayern vs Barcelona games, three Juve vs Real Games, three Real vs A.Madrid, two Barcelona vs Juve games, one Bayern vs A.Madrid game, in the knockout stages since 2013.
Yet no Barclona vs Real Madrid.