instability in Node 46 in direction UX

[Darielis]

I need help too. There is instability in Node 46 in direction UX . I tried everything I know, to fix this mistake. I did intersection,but there was no short bars,everthing looks normal. I don't know what to do. Please help as soon as possible. There's  the file too. http://speedy.sh/Mw4UA/Indoor-football-hall.rtd

[Artur.Kosakowski]

The reason for instability seems to be just large difference in stiffness of elements of the model. The 'limit' is slightly different for each of the solvers therefore Auto (Sparse) reports the instability whereas Skyline does not.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.