SolidWorks Weldments Simulation Tutorial|Model is Unstable issue RESOLVED

In this solidworks simulation tutorial I am going to do static analyses on a weldment part, there is a commmon error which usually occurs while doing analyses on any weldment part which says "Model is Unstable" I will resolve this issue in this tutorial. I will also calculate the factor of safety of this model to check whether this model is ok to manufacture or not.