# Help with error message: In vtkDataArray.cxx, line 525 vtkIdTypeArray Type mismatch: Source: float Dest: idtype
**URL:** https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288
**Category:** ParaView Support
**Tags:** vtk
**Created:** [May 25, 2021, 9:46am UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288 "2021-05-25T09:46:38Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@samridhsharma](https://discourse.paraview.org/u/samridhsharma)
#### Post date: [May 25, 2021, 9:46am UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/1 "2021-05-25T09:46:38Z")
When selecting cells and performing “Plot selection over time”, paraview gives following error:
`ERROR: In /build/paraview-vlxewD/paraview-5.7.0/VTK/Common/Core/vtkDataArray.cxx, line 525 vtkIdTypeArray (0x55bae0649ea0): Type mismatch: Source: float Dest: idtype`
And the plot of my variables with time I get is wrong.
Please help me fix this, I couldn’t find any thread resolving this problem.
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 26, 2021, 7:39am UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/2 "2021-05-26T07:39:47Z")
please share a data to reproduce the issue.
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### Author:  [@samridhsharma](https://discourse.paraview.org/u/samridhsharma)
#### Post date: [May 27, 2021, 7:01am UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/3 "2021-05-27T07:01:36Z")
Hello Mathieu,
I use my own custom solver, so can only share data, which is 1.2 GB in size.
Is it okay if I send you its google drive link?
Also, I wanted to ask: how does paraview calculates average, max and min value of field variables. Like when I select the cells of my model and get plot over time, what does it do (operating scheme) to calculate these values. Any source code I could look into, because I am unable to search any. Just need to make sure of what it’s doing.
Regards,
Samridh Sharma
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 27, 2021, 7:37am UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/4 "2021-05-27T07:37:22Z")
> [@samridhsharma](#):
>
> Is it okay if I send you its google drive link?
Yes
> [@](#):
>
> Also, I wanted to ask: how does paraview calculates average, max and min value of field variables. Like when I select the cells of my model and get plot over time, what does it do (operating scheme) to calculate these values. Any source code I could look into, because I am unable to search any. Just need to make sure of what it’s doing.
vtkProbeLineFilter : [https://gitlab.kitware.com/vtk/vtk/-/blob/master/Filters/Parallel/vtkProbeLineFilter.cxx](https://gitlab.kitware.com/vtk/vtk/-/blob/master/Filters/Parallel/vtkProbeLineFilter.cxx)
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### Author:  [@samridhsharma](https://discourse.paraview.org/u/samridhsharma)
#### Post date: [May 27, 2021, 10:17am UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/5 "2021-05-27T10:17:02Z")
Hello Mathieu,
Following is the link to my data : [cavity - Google Drive](https://drive.google.com/drive/folders/1U4pY14eiIj1lDQVzS3iHIkUNYzAuhX9F?usp=sharing)
What I have been doing so far:
1. Load case.foam on paraview.
2. select complete mesh (through) //using ‘f’ from keyboard
3. Select Plot selection over time, and Apply
4. Plot completes and error is there in output message.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 27, 2021, 1:07pm UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/6 "2021-05-27T13:07:59Z")
The `U_0` is causing these issues (as well as instabilities). I suspect a small bug in the OpenFOAMReader and in ParaView in general.
A simple work around is to uncheck U\_0 in the OpenFOAM reader cell arrays to load.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 27, 2021, 1:47pm UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/7 "2021-05-27T13:47:13Z")
@olesenm FYI
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### Author:  [@samridhsharma](https://discourse.paraview.org/u/samridhsharma)
#### Post date: [May 27, 2021, 4:05pm UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/8 "2021-05-27T16:05:38Z")
> [@mwestphal](#):
>
> The `U_0` is causing these issues (as well as instabilities). I suspect a small bug in the OpenFOAMReader and in ParaView in general.
>
> A simple work around is to uncheck U\_0 in the OpenFOAM reader cell arrays to load.
Thanks, this works!
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### Author:  [@olesenm](https://discourse.paraview.org/u/olesenm)
#### Post date: [May 28, 2021, 7:37pm UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/9 "2021-05-28T19:37:55Z")
> [@mwestphal](#):
>
> @olesenm FYI
Was waiting for an issue, or consensus on this, but already have the following code roughed in the OpenFOAM reader:
```auto
#if VTK_FOAMFILE_IGNORE_FIELD_RESTART
else if (len > 2 && (fieldFile[len - 2] == '_') && (fieldFile[len - 1] == '0'))
{
// Exclude "*_0" restart files
continue;
}
#endif
```
I would vote for ignoring these restart files, but someone else should make it a VTK issue instead of me just deciding this unilaterally.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 29, 2021, 9:02am UTC](https://discourse.paraview.org/t/help-with-error-message-in-vtkdataarray-cxx-line-525-vtkidtypearray-type-mismatch-source-float-dest-idtype/7288/10 "2021-05-29T09:02:24Z")
I have no idea what these array are for, but they should not break ParaView. Is the issue related to the name ?