[petsc-users] lock matrices in EPS

[Kong, Fande]

Hi ALL,

I am solving a generalized eigenvalue problem Ax=\lambda Bx. I want to
retrieve matrices A and B from EPS, but got the following errors:

[0]PETSC ERROR: No support for this operation for this object type
[0]PETSC ERROR: Cannot retrieve original matrices (have been modified)
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for
trouble shooting.
[0]PETSC ERROR: Petsc Release Version 3.7.5, unknown
[0]PETSC ERROR: ./ex14 on a arch-darwin-c-debug named FN604208 by kongf Mon
Feb 13 15:29:33 2017
[0]PETSC ERROR: Configure options --with-clanguage=cxx
--with-shared-libraries=1 --with-blaslapack=1 --with-mpi=1
--download-parmetis=1 --download-metis=1 --with-debugging=yes
--with-c2html=0 --download-hypre=1 --download-superlu_dist=1
PETSC_ARCH=arch-darwin-c-debug
[0]PETSC ERROR: #1 STGetOperators() line 308 in
/Users/kongf/projects/slepc/src/sys/classes/st/interface/stfunc.c
[0]PETSC ERROR: #2 EPSGetOperators() line 319 in
/Users/kongf/projects/slepc/src/eps/interface/epssetup.c


My question is how to lock the original matrices I passed to EPS.
"-st_matmode copy" does not help.

Fande Kong,
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