Hi,
from your description it sounds like this might be a memory corruption
issue. Please run your code through valgrind first. If this doesn't show
any errors, please send more context (sources, Makefile, etc.). We can
only guess what e.g. the type of 'temp' is or whether the correct header
files get picked up.
Best regards,
Karli
On 05/07/2014 11:01 AM, 张国熙 wrote:
Hi,all
I got a "Inserting -nan+iG error" at function MatSetValues.
My code like this:
I first use code below to change a double into PETScScalar (I am using
Complex version).
*for(i=0;i<nz;i++)temp[i] = Ax[i] + Az[i] * PETSC_i;*
Then I use code below to insert values into matrix.
*ierr = MatSetValues(A,n,Conlumn_ptr,n,Ai,temp,INSERT_VALUES);*
Here is how problem happens:
I compile my PETSc code into a .so lib and test it with a simple matrix
and*it passed*. So I link it with the other part of my program.
However, it keeps telling me
*
Inserting -nan+iG at matrix entry (2,3)!*
The (2,3) is zero actually, and I could print it with std::cerr which
tells me it is zero. The other part of my program,with which generates
actual matrix I will deal, is correct.(I could use ARPACK with it.)
I was confused about why PETSc recognize a zero into -nan. In my simple
test, there is also zero entry, at (0,0) however. For the other part is
compiled itself, I guess there might be some problem with compiling
options. But I have no idea about it. Could anybody help me?
Guoxi
