open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello everybody
I am doing 2D Telemac reservoir simulation, right now I am trying different solvers and was wondering how can I know which one method Finite element or finite volume is used in my solver.
Or I have to write EQUATIONS : 'SAINT-VENANT EF' and the solver
my system state steady conditions
I was trying with solver 2 solver 7 y solver 1
I have problems with the solver 1 in NP3 file, and I trying with the keyword TREATMENT OF THE LINEAR SYSTEM =2 but also failed, in NP3B file.
In the attachment are case files and the errors.
Thank you very much