Chargeing while already engaged

You cannot charge a model that you are already in melee with, but I don't see anything preventing you from charging a model you are not in melee with, even if you are engaged with another model already.

Sketches affirms on page 5

In the Errata, under General Movement Actions


(2) Charge: A model may take the Charge Action if it has a target model within its LoS, which is not already within melee range. The charging model must move along a straight path to its target, obeying the normal rules for movement (including disengaging and modifiers due to terrain) at its Cg value in inches. At the end of the Charge, the model immediately makes a melee attack with one of its basic melee weapons and receives :+fate on its Damage Flip for that attack. If the target of the Charge is out of melee range at the end of the model’s move, the Charge Action ends immediately.