Autodesk Robot Structural Analysis

[#1]

Hi all.

I is prolem. Why???

Please see picture.

And File modol :  http://www.mediafire.com/?qqg2g6bf7dxxa91

Thanks

[#2 · Accepted solution]

Try putting some supports on your model. 

Unless it's a magic floating castle?

[#3]

Thank Tony.

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tony.ridley wrote:

Unless it's a magic floating castle?

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I don't think )

[#4]

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A.wikipedia wrote:

I don't think )

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That may have been the problem.............