[petsc-users] petsc binary vtk viewer

[Jed Brown]

Dharmendar Reddy <dharmareddy84 at gmail.com> writes:

> Hello,
>          I am seeing nan's at boundary locations for a plot over line data
> on a 2D mesh. There are no nan's in the data obtained from solver.
>
> For example, When i click plot over line along y-axis in paraview, it
> selects the y-coordiantes to be from
>
> -21.141444145 to 26.426805182  , The boundary Node at the positive end is
> showing a nan.   If i change the end node to 26.426804  the nan goes away
> and i get the expected value (which is zero, as per imposed boundary
> condition).
>
> I have not seen this before with the ascii vtk writer in my fortran code.
>
> I am wondering if there is something i should be aware of petsc binary vtk
> viewer.  I run the code on a 64 bit linux cluster. I am visualizing the vtk
> file on a 32 bit paraview 3.10.1 on windows xp.

32/64-bit values shouldn't matter, but it's possible there is a bug with
64-bit-indices (I don't remember testing it).  Is the writing code
valgrind-clean?  Is it reproducible?