symmetric matrices

[Randall Mackie]

I'm trying to modify my code to take advantage of the fact that my system matrix
is symmetric.

It seemed from reading the manual pages that I could call MatCreateMPISBAIJ
to create a symmetric data matrix.

However, when I tried this, I got the error:

[1]PETSC ERROR: Lower triangular value cannot be set for sbaij format. Ignoring these value
s, run with -mat_ignore_lower_triangular or call MatSetOption(mat,MAT_IGNORE_LOWER_TRIANGUL
AR)!

So I tried including the line:

       call MatSetOption(A,MAT_IGNORE_LOWER_TRIANGULAR,ierr)

But when I tried to compile the code, I then got this message:

fortcom: Error: csem3dfwd.F, line 771: This name does not have a type, and must have an explicit type.   [MAT_IGNORE_LOWER_TRIANGULAR]
       call MatSetOption(A,MAT_IGNORE_LOWER_TRIANGULAR,ierr)
--------------------------^


So, can anyone point me in the right direction for taking advantage of the fact that
my matrices are symmetric? (they are actually complex symmetric, and NOT Hermitian).

Thanks, Randy

-- 
Randall Mackie
GSY-USA, Inc.
PMB# 643
2261 Market St.,
San Francisco, CA 94114-1600
Tel (415) 469-8649
Fax (415) 469-5044

California Registered Geophysicist
License No. GP 1034