# How to execute a command on a filter? vtkSMPropertyHelper does not help(
**URL:** https://discourse.paraview.org/t/how-to-execute-a-command-on-a-filter-vtksmpropertyhelper-does-not-help/14254
**Category:** ParaView Support
**Created:** [March 25, 2024, 8:03am UTC](https://discourse.paraview.org/t/how-to-execute-a-command-on-a-filter-vtksmpropertyhelper-does-not-help/14254 "2024-03-25T08:03:27Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@joint](https://discourse.paraview.org/u/joint)
#### Post date: [March 25, 2024, 8:03am UTC](https://discourse.paraview.org/t/how-to-execute-a-command-on-a-filter-vtksmpropertyhelper-does-not-help/14254/1 "2024-03-25T08:03:27Z")
Hello dear paraview developers!
How to force an execution of a command on my filter?
vtkSMPropertyHelper does not seem to be appropriate for that.
Thank u!
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 25, 2024, 8:25am UTC](https://discourse.paraview.org/t/how-to-execute-a-command-on-a-filter-vtksmpropertyhelper-does-not-help/14254/2 "2024-03-25T08:25:13Z")
You need to create a property with just a command, like this:
Here is an example how to use it:
```auto
//-----------------------------------------------------------------------------
void pqCommandPropertyWidget::buttonClicked()
{
vtkSMProxy* smproxy = this->proxy();
vtkSMProperty* smproperty = this->property();
if (smproperty != nullptr && smproxy != nullptr)
{
const char* pname = smproxy->GetPropertyName(smproperty);
if (pname)
{
smproxy->InvokeCommand(pname);
// Update pipeline information, if possible, otherwise, simple update
// information properties.
vtkSMSourceProxy* source = vtkSMSourceProxy::SafeDownCast(smproxy);
if (source)
{
source->UpdatePipelineInformation();
}
else
{
smproxy->UpdatePropertyInformation();
}
}
}
}
```
---
### Author:  [@joint](https://discourse.paraview.org/u/joint)
#### Post date: [March 25, 2024, 8:46am UTC](https://discourse.paraview.org/t/how-to-execute-a-command-on-a-filter-vtksmpropertyhelper-does-not-help/14254/3 "2024-03-25T08:46:47Z")
I dont get it, could you explain it please?
Where is property created here?
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 25, 2024, 8:48am UTC](https://discourse.paraview.org/t/how-to-execute-a-command-on-a-filter-vtksmpropertyhelper-does-not-help/14254/4 "2024-03-25T08:48:10Z")
The property is coming from a XML file, as all properties are.
The call that trigger the command server side is `smproxy->InvokeCommand(pname);`
---
### Author:  [@joint](https://discourse.paraview.org/u/joint)
#### Post date: [March 25, 2024, 8:49am UTC](https://discourse.paraview.org/t/how-to-execute-a-command-on-a-filter-vtksmpropertyhelper-does-not-help/14254/5 "2024-03-25T08:49:16Z")
But what if I need to execute a command which is not a part of XML file?
( but is present in ClientServer wrapping )
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 25, 2024, 8:50am UTC](https://discourse.paraview.org/t/how-to-execute-a-command-on-a-filter-vtksmpropertyhelper-does-not-help/14254/6 "2024-03-25T08:50:38Z")
> [@joint](#):
>
> But what if I need to execute a command which is not a part of XML file?
Then this is a RMI call, it is much more complex, I’d suggest not to do it but to rely on a XML property instead (which basically handle all the complex stuff for you).