# SNESSetFunctionDomainError
tells `SNES` that the input vector, a proposed new solution, to your function you provided to `SNESSetFunction()` is not in the functions domain. For example, a step with negative pressure. 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESSetFunctionDomainError(SNES snes)
```
Logically Collective


## Input Parameters

- ***snes -*** the `SNES` context





## Note
You can direct `SNES` to avoid certain steps by using `SNESVISetVariableBounds()`, `SNESVISetComputeVariableBounds()` or
`SNESLineSearchSetPreCheck()`, `SNESLineSearchSetPostCheck()`


## See Also
 `SNESCreate()`, `SNESSetFunction()`, `SNESFunction`, `SNESSetJacobianDomainError()`, `SNESVISetVariableBounds()`,
`SNESVISetComputeVariableBounds()`, `SNESLineSearchSetPreCheck()`, `SNESLineSearchSetPostCheck()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/interface/snes.c.html#SNESSetFunctionDomainError">src/snes/interface/snes.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex10.c.html">src/ts/tutorials/ex10.c.html</A><BR>


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[Index of all SNES routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)