Not sure if this removes the line but when creating the fill did you have the merge result box ticked? This should at least save you the added task of knitting the surfaces together.
I will play around and see if I get a good result. Will post back if I get any progress.
Just to confirm, I take it the surface is curved?
Played around and found that for the tangent lines removed option to work you need to select contact type as tangent in the fill boundary options and set all to tangent.
I also selected fix boundary and merge but dont think both are required for this to work but I would advise on the merge at least to save you an extra task of knitting.
Hope this works
Depends on the surface/hole etc. For a trial use simply use extend surface option and fill the value based on trail and error.
No, it is not possible to remove this line (because it is topology that is necessary because of the fill surface you created.) Now, let me ask you what your are trying to do? Is this a hole that was created by you or someone else (imported model?) If so, then you might be able to use the Delete face on the default option (delete and patch.) This will find the original face and extend it. Also you might want to try the insert>Surface>Untrim to also try and regain the original surface.
A screen shot would help...
Thanks for the lightning fast responses guys!
I tried the 'Untrim Surface' feature and it worked out perfectly.
Thanks a million,