:orphan:
# SNESReset
Resets a `SNES` context to the snessetupcalled = 0 state and removes any allocated `Vec`s and `Mat`s 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESReset(SNES snes)
```
Collective


## Input Parameter

- ***snes -*** iterative context obtained from `SNESCreate()`





## Notes
Call this if you wish to reuse a `SNES` but with different size vectors

Also calls the application context destroy routine set with `SNESSetComputeApplicationContext()`


## See Also
 [](ch_snes), `SNES`, `SNESDestroy()`, `SNESCreate()`, `SNESSetUp()`, `SNESSolve()`

## Level
intermediate

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

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/composite/snescomposite.c.html#SNESReset_Composite">SNESReset_Composite in src/snes/impls/composite/snescomposite.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/fas/fas.c.html#SNESReset_FAS">SNESReset_FAS in src/snes/impls/fas/fas.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/gs/snesgs.c.html#SNESReset_NGS">SNESReset_NGS in src/snes/impls/gs/snesgs.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ls/ls.c.html#SNESReset_NEWTONLS">SNESReset_NEWTONLS in src/snes/impls/ls/ls.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ms/ms.c.html#SNESReset_MS">SNESReset_MS in src/snes/impls/ms/ms.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/multiblock/multiblock.c.html#SNESReset_Multiblock">SNESReset_Multiblock in src/snes/impls/multiblock/multiblock.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/nasm/nasm.c.html#SNESReset_NASM">SNESReset_NASM in src/snes/impls/nasm/nasm.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ncg/snesncg.c.html#SNESReset_NCG">SNESReset_NCG in src/snes/impls/ncg/snesncg.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ngmres/snesngmres.c.html#SNESReset_NGMRES">SNESReset_NGMRES in src/snes/impls/ngmres/snesngmres.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/ntrdc/ntrdc.c.html#SNESReset_NEWTONTRDC">SNESReset_NEWTONTRDC in src/snes/impls/ntrdc/ntrdc.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/patch/snespatch.c.html#SNESReset_Patch">SNESReset_Patch in src/snes/impls/patch/snespatch.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/qn/qn.c.html#SNESReset_QN">SNESReset_QN in src/snes/impls/qn/qn.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/richardson/snesrichardson.c.html#SNESReset_NRichardson">SNESReset_NRichardson in src/snes/impls/richardson/snesrichardson.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/shell/snesshell.c.html#SNESReset_Shell">SNESReset_Shell in src/snes/impls/shell/snesshell.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/vi/rs/virs.c.html#SNESReset_VINEWTONRSLS">SNESReset_VINEWTONRSLS in src/snes/impls/vi/rs/virs.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/vi/ss/viss.c.html#SNESReset_VINEWTONSSLS">SNESReset_VINEWTONSSLS in src/snes/impls/vi/ss/viss.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/impls/vi/vi.c.html#SNESReset_VI">SNESReset_VI in src/snes/impls/vi/vi.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/snes/interface/snes.c)


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