MueLu block size warning
Created by: aprokop
Per user:
I have an application that uses Tpetra + MueLu + Belos to solve linear systems obtained via finite element assembly. To create the MueLu preconditioner, I am using the function: MueLu::CreateTpetraPreconditioner:
I am passing this function the required Tpetra::Operator (inA) and input Teuchos::ParameterList (inParamList), as well as the optional coordinate Tpetra::MultiVector (inCoords). For a problem with 3 degrees of freedom per node (linear elasticity), I specify the MueLu input parameter "number of equations" to be equal to 3, and I see the warning below:
******* WARNING *******
Setting matrix block size to 3 (value of the parameter in the list)
instead of 1 (provided matrix).
You may want to check "number of equations" (or "PDE equations" for
factory style list) parameter.
I am curious if anyone has experienced this before, and if the fix is immediately obvious.