[petsc-users] PetscOptionsGetString Not Finding Option

[Jared Crean]

   Hell Hong,
         Is there a way to directly query the options database to get 
the value of Petsc options?  This is related to the discussion here: 
http://lists.mcs.anl.gov/pipermail/petsc-dev/2015-July/017944.html .  I 
though PetscOptionsGetString and PetscOptionsSetValue would provide this 
capability, but now it seems like petsc options cannot be accessed.

     Jared Crean

On 11/01/2015 10:19 AM, Hong wrote:
> Jared :
> Either call KSPSetPCSide() or change
> const char name[] = "-ksp_pc_side"
> to a non-petsc option name, e.g., "-my_ksp_pc_side".
>
> Hong
>
>     Hello,
>         I am trying to use PetscOptionsGetString to retrieve the value
>     of an option in the options database, but the value returned in
>     the last argument indicates the option was not found.   In the
>     attached code (a modified version of ksp example 2), the string
>     "-ksp_pc_side" is passed in as the argument name. If I run the code as
>
>         ./jc2 -pc_type ilu -ksp_pc_side right
>
>         I get the output:
>
>         option -ksp_pc_side was found
>
>         from line 71 of the file.  Petsc does not complain of unused
>     options when the program finishes.  Am I using this function
>     incorrectly?
>
>         Jared Crean
>
>

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