Tween 2 curves along another curve

Currently attempting to blend the curve highlighted in red with the curve highlighted in blue along the curve highlighted in yellow and create a surface from the resulting.

Using Pufferfish plugin for Grasshopper to Tween two curves along another but it is not working properly. Angle of the yellow curve may be too steep?

Any advice grateful.

please change the tags to grasshopper and post your definition

@Jason_Cooper as you already noticed the curve you marked yellow has a tight curvature that will cause self intersection. In this case a 2 rail sweep will probably be a better option.