difficult to say, based on a picture. Would you share the 3dm file? If you do not want to, you could cut away everything that is not important to explore the problem:-)
Hi ndrakey, yes please post the 3DM file so it will be possible to take a closer look at your object there. It's difficult to tell what might be wrong just from a screenshot alone.
Well it's the kind of fillet scenario I know MoI has so trouble with.
I have reproduced the problem in this model (attach), it shouldn't be to much different from what ndrakey is dealing with.
I would trim the area and blend the result as a workaround.
Yeah well thanks for the blending tip. It works! But it doesnt look nearly as good as a good bevel :).
I think the beautiful and easy beveling is what makes Moi so special. Is it important how sharp the pipes angle is in order to get a good bevel?