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AssertionError - solvers.CG

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4 years 5 months ago #2141 by creativeworker
AssertionError - solvers.CG was created by creativeworker
Hello,

I updated my NGSolve Environment to 1909 and now I get an AssertionError (# either pre or freedofs must be given) in the solvers.CG method.
Indeed I use my solver without a preconditioner: solvers.CG(mat=a.mat, rhs=res, sol=du, tol=1E-06, maxsteps = 100)

What do I have to change to update to the new behavior?

Thanks for your help in advance!
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4 years 4 months ago - 4 years 4 months ago #2156 by christopher
Replied by christopher on topic AssertionError - solvers.CG
You need to pass the freedofs of the space. freedofs=fes.FreeDofs(). Actually this was necessary to work savely with dirichlet bcs before was well, we just put the check in for safety.
Best
Christopher
Last edit: 4 years 4 months ago by christopher.
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