# PetscViewerHDF5WriteGroup
Ensure the HDF5 group exists in the HDF5 file 
## Synopsis
```
#include "petscviewerhdf5.h" 
PetscErrorCode PetscViewerHDF5WriteGroup(PetscViewer viewer, const char path[])
```
Not collective


## Input Parameters

- ***viewer -*** the `PetscViewer` of type `PETSCVIEWERHDF5`
- ***path -*** (Optional) The path relative to the pushed group



## Note
If path starts with '/', it is taken as an absolute path overriding currently pushed group, else path is relative to the current pushed group.
So NULL or empty path means the current pushed group.

This will fail if the viewer is not writable.




## See Also
 [](sec_viewers), `PETSCVIEWERHDF5`, `PetscViewerHDF5Open()`, `PetscViewerHDF5PushGroup()`, `PetscViewerHDF5PopGroup()`, `PetscViewerHDF5GetGroup()`, `PetscViewerHDF5OpenGroup()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/classes/viewer/impls/hdf5/hdf5v.c.html#PetscViewerHDF5WriteGroup">src/sys/classes/viewer/impls/hdf5/hdf5v.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/classes/viewer/impls/hdf5/hdf5v.c)


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