BPS objects in N=2 supersymmetric gauge theories

We explore BPS soliton configurations in N=2 supersymmetric Yang-Mills theory with matter fields arising from parallel D3 branes on D7 branes. Especially we focus on a two parameter family of 1/8 BPS equations, dyonic objects, and 1/8 BPS objects and raise a possibility of the absence of BPS vortices when the number of D3 branes is larger than that of D7 branes.