3D Sketch Plane Issue

Hi,

Recently I've been experiencing problems while working with planes inside 3D sketches (I'm currently on SW 2013 SP 4.0). The issue is: whenever I create 4 (or more) connected lines with the endpoints being positioned anywhere in space, then create a plane (using the plane tool within the 3D sketch) by selecting any 3 endpoints and finally select the 4th remaining endpoint and apply "On Plane" relation to it so that it would also be the same newly created plane (thus forming a planar 4-sided polygon), SW would refuse to do that and would give me an error message saying "item is unsolvable". It must be a glitch of some sort because I've been successfully using this method for years and in fact one of my colleagues, who's using SW 2011, quickly tested it on her computer and it worked just fine... has anyone been dealing with this issue by chance? I wonder if it's only happening on the latest SP 4.0 and not on some of the previous SPs. Any help would be greatly appreciated!

Regards,

Vadim Pugachevskiy

SolidworksParts And Features