# PetscViewerExodusIIOpen
Opens a file for ExodusII input/output. 
## Synopsis
```
#include "petscdmplex.h"   
PetscErrorCode PetscViewerExodusIIOpen(MPI_Comm comm, const char name[], PetscFileMode type, PetscViewer *exo)
```
Collective


## Input Parameters

- ***comm -*** MPI communicator
- ***name -*** name of file
- ***type -*** type of file


```none
    FILE_MODE_WRITE - create new file for binary output
    FILE_MODE_READ - open existing file for binary input
    FILE_MODE_APPEND - open existing file for binary output
```



## Output Parameter

- ***exo -*** `PETSCVIEWEREXODUSII` `PetscViewer` for Exodus II input/output to use with the specified file





## See Also
 `PETSCVIEWEREXODUSII`, `PetscViewer`, `PetscViewerPushFormat()`, `PetscViewerDestroy()`,
`DMLoad()`, `PetscFileMode`, `PetscViewer`, `PetscViewerSetType()`, `PetscViewerFileSetMode()`, `PetscViewerFileSetName()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/plexexodusii.c.html#PetscViewerExodusIIOpen">src/dm/impls/plex/plexexodusii.c</A>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/plex/plexexodusii.c)


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