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Dear PETSc Team,
I would like to make a matrix-matrix product of two matrices. I try to use CALL MatMatMult(Mat_A,MAT_B,MAT_INITIAL_MATRIX,PETSC_DEFAULT_REAL,MAT_AB,IERROR). // calling from fortran When I try to use this function I get the following error message: "Unspecified symbolic phase for product AB with A seqbaij, B seqbaij. The product is not supported” I am using the seqbaij matrix format. Is MatMatMult and MatProductSymbolic only defined for the standard point-wise matrix format but not for a blocked format ?! In the documentation, I could not see a hint on supported matrix formats or any limitations. The examples also just use a point-wise format (AIJ), as I can see so far. Greetings, Frank Bramkamp
