# PetscCommRestoreComm
restores an MPI communicator that was obtained with `PetscCommGetComm()` 
## Synopsis
```
#include "petscsys.h"   
PetscErrorCode PetscCommRestoreComm(MPI_Comm comm_in, MPI_Comm *comm_out)
```
Collective


## Input Parameters

- ***comm_in -*** Input communicator
- ***comm_out -*** returned communicator





## See Also
 `PetscObjectGetNewTag()`, `PetscCommGetNewTag()`, `PetscCommDestroy()`, `PetscCommRestoreComm()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/objects/tagm.c.html#PetscCommRestoreComm">src/sys/objects/tagm.c</A>


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