FEA Analysis - STAAD.Pro Error: Joint No 0 does not exist

Hi All,

I was hoping someone can help me.

I am trying to perform a Finite Element Analysis of a Plate with a load on 100KN but the subject error stops the analysis.

I have searched but coudn't find the solution. Can anybody guide me please how to remove this error.

I have attached the document any help that you me be able to carry it will be much appreciated. 

Thank you,Staad bro plate FEA

Ali