# is it possible to add new connections to a fitler port via the pipeline browser
**URL:** https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149
**Category:** ParaView Support
**Created:** [January 18, 2019, 9:57am UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149 "2019-01-18T09:57:16Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)
#### Post date: [January 18, 2019, 9:57am UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/1 "2019-01-18T09:57:16Z")
Hello,
Everything is in the title ! I want to add a second connection to the port 0 of a filter via the pipeline browser. Is it feasible ?
Thanks.
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 18, 2019, 10:01am UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/2 "2019-01-18T10:01:22Z")
- Right click on your filter
- Change inputs
- Click on the inputs you want to use
- Ok
---
### Author:  [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)
#### Post date: [January 18, 2019, 10:55am UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/3 "2019-01-18T10:55:33Z")
I can only choose one filter (I tried using CTRL to select a second input but it won’t let me).
In fact, I don’t want to add an input to another port (my filter has only one port) ! I just want to add a connection to the first port of it (index 0) ! I have already done this in VTK with AddInputConnection…
If this feature doesn’t exist, I may spent some time to implement it and contribute it to ParaView… I just need a confirmation that it does not exist.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 18, 2019, 12:05pm UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/4 "2019-01-18T12:05:03Z")
This is because your filter does not declare its input as repeatable. Which filter are you using ?
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### Author:  [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)
#### Post date: [January 18, 2019, 12:09pm UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/5 "2019-01-18T12:09:30Z")
You’re right ! I will fix that in my code and try again…
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### Author:  [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)
#### Post date: [January 18, 2019, 3:54pm UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/6 "2019-01-18T15:54:59Z")
I’m using a custom filter, and no it still doesn’t work, with CTRL button I can’t select a second input for my filter having :
```
int myMagnitudeFilter::FillInputPortInformation(int port, vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_IS_REPEATABLE(), 1);
return Superclass::FillInputPortInformation(port, info); // no information will be removed here
}
```
PS : I’m using ParaView 5.4.1
In the pqChangeInputDialog’s constructor, I saw that the multiple connection properties is retrieved from the proxy (thus XML isn’t it), so what should I do ?
Otherwise, is it possible to have a vtkWriter class with a single port (mandatory anyway) and having multiple connections in a Catalyst Pipeline ?
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 21, 2019, 9:26am UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/7 "2019-01-21T09:26:20Z")
You are missing the following xml code : `multiple_input="1"`
It may look like this :
```
This property specifies the datasets to be merged into a
single dataset by the Append Datasets filter.
```
---
### Author:  [@embeddedmz](https://discourse.paraview.org/u/embeddedmz)
#### Post date: [January 21, 2019, 9:56am UTC](https://discourse.paraview.org/t/is-it-possible-to-add-new-connections-to-a-fitler-port-via-the-pipeline-browser/1149/8 "2019-01-21T09:56:48Z")
Thank you, Yes, I found how to do it, I had also to change SetInputConnection to AddInputConnection (I just took a look at filters.xml).
When using Catalyst, I noticed something odd : timestamps retrieved via vtkStreamingDemandDrivenPipeline::UPDATE\_TIME\_STEP key :
`double con1time = inputVector[0]->GetInformationObject(0)->Get(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP()); double con2time = inputVector[0]->GetInformationObject(1)->Get(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP());`
are not epochs when my filter has 2 inputs connections on its port, but rather incremental reals, something like: 1, 1.5, 2, 3, 4, 4.5 etc… in both connections.
Can you please give me an explanation ? How can I fix it ? Thanks.
Otherwise, the filter in question, is a writer, I succeeded in creating a python pipeline script via ParaView in which, I connected the output of 2 filters in the the first port of the writer, I used that in the XML (by the way, do you think my XML is “good” ?)
```
```
Thanks !