Mercury square or opposite Venus

Neither the square nor the opposition occurs between Mercury and Venus. Mercury never appears more than about twenty eight degrees from the Sun and Venus no more than about forty eight, so with the two on opposite sides of the Sun their separation cannot exceed roughly seventy five and a half degrees. A square needs ninety, and the aspect engine allows eight degrees of orb, so the loosest square would require eighty two. Software reporting either contact has a data problem. Friction involving this pair shows instead in their aspects to Mars, Saturn, Uranus or Neptune, or in the semisquare at forty five degrees where minor aspects are used.