3 error flag

[behrooz_ghaemi]

this message clear
warning band gen lin lapack solver::solve() -lapack routine returned 1
warning newton raphson::solve currentstep() the linear sys ofeqn failed in solve()

analyze failed,returned:-3 error flag

[silvia]

your system is not fully constrained.

[behrooz_ghaemi]

how can i check constrain?

[silvia]

check your model and the boundary conditions and the connections

[peymannp]

Hello everyone
I have a question which is related to this error.
Is it possible that after some step(after earthquake subjection) the system looses its constraint?


bests

[NikosCV]

peymannp wrote:
> Hello everyone
> I have a question which is related to this error.
> Is it possible that after some step(after earthquake subjection) the system
> looses its constraint?
>
>
> bests

I'm also interested in this question.

[fmk]

the model looses it's constarint if you tell it to remove a constraint!

otherwise, if you get the error during the analysis it means that the solver is failing due to ill-conditioning, being unstable, or no longer being symmetric positive definite if you are using a spd solver.