Hello, K163 beam is connected to K108 on the ground floor. However, the node point is formed further than the coordinate to which K163 is connected. Analysis can be made if the relevant nodal points are overlapped. Note: -upper rigid basement floor number- (-2 It would be appropriate to enter )- Good work"FinalDurak":17m3lqel" said:Hi; When I want to analyze, it gives an error "pivot error in matrix reduction". I checked the relevant node but I couldn't find the error. I would appreciate your help. Thanks...