# PetscOptionsReject

Generates an error if a certain option is given.

### Synopsis

    #include "petsc.h"
    int PetscOptionsReject(const char name[],const char mess[])

Not Collective, but setting values on certain processors could cause problems for parallel objects looking for options.

### Input Parameters

| name | - the option one is seeking
| mess | - error message (may be PETSC_NULL)

### See Also

PetscOptionsGetInt(), PetscOptionsGetReal(),OptionsHasName(),
PetscOptionsGetString(), PetscOptionsGetIntArray(), PetscOptionsGetRealArray(), PetscOptionsLogical(), PetscOptionsName(), PetscOptionsBegin(), PetscOptionsEnd(), PetscOptionsHead(), PetscOptionsStringArray(),PetscOptionsRealArray(), PetscOptionsScalar(), PetscOptionsLogicalGroupBegin(), PetscOptionsLogicalGroup(), PetscOptionsLogicalGroupEnd(), PetscOptionsList(), PetscOptionsEList()

Level:advanced
Location: src/sys/src/objects/options.c
Index of all Sys routines
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