# Merge Blocks of a Tecplot .plt file
**URL:** https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000
**Category:** ParaView Support
**Created:** [January 20, 2025, 12:06pm UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000 "2025-01-20T12:06:32Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@enrisang](https://discourse.paraview.org/u/enrisang)
#### Post date: [January 20, 2025, 12:06pm UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/1 "2025-01-20T12:06:32Z")
Hi!
I’m a new here. I ran a CFD simulation and exported the result into Tecplot format (.plt). When I load the .plt file in Paraview, **two different mesh zones are recognized** and the Point Arrays of interest (x, y, z velocity components, and cell volume) are separated.
I want to merge these two blocks, eliminating the points in common. I tried with the Merge Blocks filter and obtained a unique mesh (the common points have been merged) but the Point Arrays are not merged and they completely disappear.
How can I merge also the arrays? Hope to have been clear enough.
Maybe this issue can be addressed easily, but I haven’t found any solutions.
Thanks
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 20, 2025, 12:22pm UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/2 "2025-01-20T12:22:33Z")
> [@enrisang](#):
>
> How can I merge also the arrays? Hope to have been clear enough.
Its very clear but merge blocks should merge the arrays too.
Edit:
Nevermind, the arrays are not on all blocks, What do you expect to have in the blocks that do not have arrays ?
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### Author:  [@enrisang](https://discourse.paraview.org/u/enrisang)
#### Post date: [January 20, 2025, 1:19pm UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/3 "2025-01-20T13:19:19Z")
Actually, both blocks have the same arrays (x, y, z coordinates; x, y, z velocity components; cell volume) but the names are different.
Arrays of zone 2 start with the prefix “zone2/”, while those of zone 1 don’t.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 20, 2025, 1:20pm UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/4 "2025-01-20T13:20:18Z")
Then you should be able to rename the arrays using RenameArrays filter, Calculator may also be an option here.
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### Author:  [@enrisang](https://discourse.paraview.org/u/enrisang)
#### Post date: [January 20, 2025, 1:28pm UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/5 "2025-01-20T13:28:44Z")
Okay, now the Merge Block filter is working. I renamed the arrays of zone 2 with the same names as those of zone 1 using the RenameArrays filter.
I had already tried before to do this with Calculator but had not succeeded.
Thank you!!!
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### Author:  [@bbritto](https://discourse.paraview.org/u/bbritto)
#### Post date: [March 21, 2025, 12:59pm UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/6 "2025-03-21T12:59:58Z")
Hi, I am also facing this issue, but I am unable replicate what you did. Could you explain it in detail, because I cannot find the RenameArrays filter in paraview GUI.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [April 26, 2025, 5:19am UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/7 "2025-04-26T05:19:00Z")
Update your version of ParaView
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### Author:  [@bbritto](https://discourse.paraview.org/u/bbritto)
#### Post date: [August 29, 2025, 9:34am UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/8 "2025-08-29T09:34:07Z")
But I have to use paraview version below 5.10 , so is there a way to do in older versions which doesn’t have this renameArray filter?
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [August 29, 2025, 9:36am UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/9 "2025-08-29T09:36:30Z")
> [@bbritto](#):
>
> I have to use paraview version below 5.10
Why ?
> is there a way to do in older versions which doesn’t have this renameArray filter?
You can do that using a programmable filter.
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### Author:  [@bbritto](https://discourse.paraview.org/u/bbritto)
#### Post date: [August 29, 2025, 9:40am UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/10 "2025-08-29T09:40:06Z")
Because we have post processing tool that is developed couple of years ago using paraview 5.9, and its has not been updated such that its compatible with new versions of paraview.
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### Author:  [@bbritto](https://discourse.paraview.org/u/bbritto)
#### Post date: [August 29, 2025, 9:41am UTC](https://discourse.paraview.org/t/merge-blocks-of-a-tecplot-plt-file/16000/11 "2025-08-29T09:41:41Z")
Could you provide a sample for how this can be used ?