Hi Defonten, I'll check out your model shortly.

re:
> Also I'm attaching a picture where I tried to fillet an edge of a Solid but it gives completely detached fillet instead..

That means that the fillet engine was not able to trim the solid to make space for the fillet. When that happens but fillet surfaces were able to be generated, those surfaces will still be output so you can have a chance to use them and possibly trim some space manually to get them in place.

It's pretty difficult to guess at why it's behaving like that from just looking at the screenshot though, it helps a lot if you are able to send the .3dm model file as well with questions like these. My best guess is that it looks like you've got a previous fillet of equal or smaller radius that you're trying to make this new fillet also pass through. That tends to be a difficult calculation because a large fillet that tries to go around a smaller radius bend will have a type of bunching effect like this:



- Michael