我用BWBN材料替换了钢混材料，一直显示截面错误，以下是报错
OpenSees > source 2c3zjdy1.tcl
WARNING - ForceBeamColumn2d::update - failed to get compatible element forces & deformations for element: 1(dW: << nan)
Domain::update - domain failed in update
LoadControl::update - model failed to update for new dU
WARNING NewtonRaphson::solveCurrentStep() -the Integrator failed in update()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at load factor 0.1
OpenSees > analyze failed, returned: -3 error flag
Model Built
Ground Motion Done. End Time: 200.000000
OpenSees > source 2c3zjdy1.tcl
WARNING - ForceBeamColumn2d::update - failed to get compatible element forces & deformations for element: 1(dW: << nan)
Domain::update - domain failed in update
LoadControl::update - model failed to update for new dU
WARNING NewtonRaphson::solveCurrentStep() -the Integrator failed in update()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at load factor 0.1
OpenSees > analyze failed, returned: -3 error flag
Model Built
Ground Motion Done. End Time: 200.000000
