# TSSetPostStep
Sets the general-purpose function called once at the end of each time step. 
## Synopsis
```
#include "petscts.h"  
PetscErrorCode TSSetPostStep(TS ts, PetscErrorCode (*func)(TS))
```
Logically Collective


## Input Parameters

- ***ts   -*** The `TS` context obtained from `TSCreate()`
- ***func -*** The function



## Calling sequence of func
```none
func (TS ts);
```




## Note
The function set by `TSSetPostStep()` is called after each successful step. The solution vector X
obtained by `TSGetSolution()` may be different than that computed at the step end if the event handler
locates an event and `TSPostEvent()` modifies it. Use `TSSetPostEvaluate()` if an unmodified solution is needed instead.


## See Also
 [](chapter_ts), `TS`, `TSSetPreStep()`, `TSSetPreStage()`, `TSSetPostEvaluate()`, `TSGetTimeStep()`, `TSGetStepNumber()`, `TSGetTime()`, `TSRestartStep()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/interface/ts.c.html#TSSetPostStep">src/ts/interface/ts.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex48.c.html">src/ts/tutorials/ex48.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex77.c.html">src/ts/tutorials/ex77.c.html</A><BR>


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