Errors in modelling

[VISHAL BHATIA]

I am carrying out static analysis of a 3 storey steel frame in opensees. The loads are only gravity loads. The analysis objects that i use are:

constraints Transformation;
numberer RCM;
system ProfileSPD;
test NormDispIncr 1.0e-8 6;
algorithm ModifiedNewton;
integrator LoadControl 1;
analysis Static;
analyze 1;
loadConst -time 0.0;

The analysis doesnt get completed and gives the following error:

WARNING - ForceBeamColumn2d::update - failed to get compatible element forces &
deformations for element: 102(dW: << 0.00476006)
WARNING - ForceBeamColumn2d::update - failed to get compatible element forces &
deformations for element: 502(dW: << 0.00476006)
Domain::update - domain failed in update
LoadControl::update - model failed to update for new dU
WARNING ModifiedNewton::solveCurrentStep() -the Integrator failed in update()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at
load factor 1
OpenSees > analyze failed, returned: -3 error flag

Can anyone tell me what the errors and warnings mean? I am also not able to understand what dU and dW stand for. i dont get any results at the end. Also, If I change the constraint type and the algorithm type and try different types, the number of warnings for compatibility increases or decreases. Can anyone decipher the errors and warnings?

[silvia]

please compare it to the examples manual.
also, i think you should take more small steps.