TypeError: in method 'la_solve', argument 3 of type 'dolfin::GenericVector const &'

Hi,

It gave me the error when I tried 'solve(A, U, b)' in which U and b are vectors with the same size (I checked). What does the error exactly mean?

Thank you!

asked Jun 3, 2015 by jhe FEniCS Novice (270 points)

This is the type system complaining, it's not related to the size of your linear algebra objects.

You need to provide more detail: what is the type of the objects A, U, b that you send to solve?

Tip: print type(A)

commented Jun 5, 2015 by martinal FEniCS User (2,800 points)

I'm having the same problem. My types are...

A: class 'dolfin.cpp.la.Vector'
U: class 'dolfin.cpp.la.GenericVector'
b: class 'dolfin.cpp.la.GenericVector'

Did OP resolve the issue? how?

commented Aug 29, 2015 by andybond13 FEniCS Novice (100 points)

You want to solve a linear system A U = b, where A is a matrix representing the linear system and U and b are vectors. Looking at your types, your A is a vector.

commented Aug 31, 2015 by martinal FEniCS User (2,800 points)

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