# Paraview 5.7.0 does not load more than 12000 cells-(ubuntu 20.04 python 3.8.2)
**URL:** https://discourse.paraview.org/t/paraview-5-7-0-does-not-load-more-than-12000-cells-ubuntu-20-04-python-3-8-2/4465
**Category:** Development
**Created:** [May 31, 2020, 6:03pm UTC](https://discourse.paraview.org/t/paraview-5-7-0-does-not-load-more-than-12000-cells-ubuntu-20-04-python-3-8-2/4465 "2020-05-31T18:03:14Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@lanjal](https://discourse.paraview.org/u/lanjal)
#### Post date: [May 31, 2020, 6:03pm UTC](https://discourse.paraview.org/t/paraview-5-7-0-does-not-load-more-than-12000-cells-ubuntu-20-04-python-3-8-2/4465/1 "2020-05-31T18:03:15Z")
Hi I created an R script to create an KML ASCII UNSTRUCTURED\_GRID. It works fine, but when I create a file using the same scritpt with more cells I get the following error:
```auto
ERROR: In /build/paraview-vlxewD/paraview-5.7.0/VTK/IO/XML/vtkXMLUnstructuredDataReader.cxx,
line 601 vtkXMLUnstructuredGridReader (0x558f36e3bbf0): Cannot read cell offsets
from Cells in piece 0 because the "offsets" array is not long enough.
```
Tried do to the same using Legacy ASCII and the same thing occurs. Works fine but if I increase the number of cells above ~ 12000 I get this error:
```auto
ERROR: In /build/paraview-vlxewD/paraview-5.7.0/VTK/IO/Legacy/vtkDataReader.cxx, line 3276
vtkUnstructuredGridReader (0x558f3863f3b0): Error reading ascii cell data! for file:
/home/andre/modeling/RGSLib/BlockModel.vtk
```
Two days checking everything, rewrote the script and the same. Is this a bug? files are less than 0.5G. Tried modifying types (float, double) and nothing…
Cheers,
André
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 1, 2020, 1:22am UTC](https://discourse.paraview.org/t/paraview-5-7-0-does-not-load-more-than-12000-cells-ubuntu-20-04-python-3-8-2/4465/2 "2020-06-01T01:22:49Z")
This code changed quite a bit, could you try with ParaView 5.8.0 ?
---
### Author:  [@lanjal](https://discourse.paraview.org/u/lanjal)
#### Post date: [June 1, 2020, 7:53am UTC](https://discourse.paraview.org/t/paraview-5-7-0-does-not-load-more-than-12000-cells-ubuntu-20-04-python-3-8-2/4465/3 "2020-06-01T07:53:34Z")
I will give a try but the Ubuntu 20.04 ‘f… all fossa’ does not come with python3,7, I will install it from source and then i will install 5.8 from source too. Python VTK wheel for python 3.8 is not available for focal fossa yet.
Definitively it is something related to memory handling of ASCII legacy, when I try to open other vtk’s together with the one that opened before (less than 12000 cells). depending on the order it does not open giving the same error. If I open it alone it works. weird.
Thanks anyway, Have a good week!
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 1, 2020, 8:13am UTC](https://discourse.paraview.org/t/paraview-5-7-0-does-not-load-more-than-12000-cells-ubuntu-20-04-python-3-8-2/4465/4 "2020-06-01T08:13:58Z")
Ubuntu/Debian provided ParaView 5.7.0 has multiple known bugs. Please use our binary release instead : [https://www.paraview.org/download/](https://www.paraview.org/download/)
---
### Author:  [@lanjal](https://discourse.paraview.org/u/lanjal)
#### Post date: [June 1, 2020, 11:19am UTC](https://discourse.paraview.org/t/paraview-5-7-0-does-not-load-more-than-12000-cells-ubuntu-20-04-python-3-8-2/4465/5 "2020-06-01T11:19:39Z")
Thanks Mathieu, Same problem with 5.8, I will check again my script to see what am I doing wrong, or maybe it is another python 3.8.2 on Ubuntu 20.04 issue