:orphan:
# PetscViewerHDF5HasObject
Check whether a dataset with the same name as given object exists in the HDF5 file under current group
## Synopsis
```
#include "petscviewerhdf5.h"
PetscErrorCode PetscViewerHDF5HasObject(PetscViewer viewer, PetscObject obj, PetscBool *has)
```
Collective
## Input Parameters
- ***viewer -*** The `PETSCVIEWERHDF5` viewer
- ***obj -*** The named object
## Output Parameter
- ***has -*** Flag for dataset existence
## Notes
If the object is unnamed, an error occurs.
If the path current_group/object_name exists but is not a dataset, has is set to `PETSC_FALSE` as well.
## See Also
[](sec_viewers), `PETSCVIEWERHDF5`, `PetscViewerHDF5Open()`, `PetscViewerHDF5HasDataset()`, `PetscViewerHDF5HasAttribute()`, `PetscViewerHDF5PushGroup()`, `PetscViewerHDF5PopGroup()`, `PetscViewerHDF5GetGroup()`
## Level
advanced
## Location
src/sys/classes/viewer/impls/hdf5/hdf5v.c
## Examples
src/ksp/ksp/tutorials/ex27.c
---
[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](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)