# Save multiblock data to CSV
**URL:** https://discourse.paraview.org/t/save-multiblock-data-to-csv/4634
**Category:** ParaView Support
**Created:** [June 21, 2020, 9:26pm UTC](https://discourse.paraview.org/t/save-multiblock-data-to-csv/4634 "2020-06-21T21:26:34Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Andrey](https://discourse.paraview.org/u/Andrey)
#### Post date: [June 21, 2020, 9:26pm UTC](https://discourse.paraview.org/t/save-multiblock-data-to-csv/4634/1 "2020-06-21T21:26:34Z")
Hello!
My question is about saving data to a csv file.
I’m trying to save the slice of multiblock cgns. Earlier (before version 5.7) I was getting a set of csv files separately for each block. Now (version 5.8) I get one file.
The problem is that this file contains data for only one block.
Can you please tell me how to avoid this error?
Thanks in advance.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 22, 2020, 8:01am UTC](https://discourse.paraview.org/t/save-multiblock-data-to-csv/4634/2 "2020-06-22T08:01:19Z")
Indeed, this is a bug. It has been partially corrected by saving all blocks in a single file, this fix will be available in ParaView 5.9.0. You can try it by downloading a nightly release.
[https://gitlab.kitware.com/paraview/paraview/-/merge\_requests/3941](https://gitlab.kitware.com/paraview/paraview/-/merge_requests/3941)
There is another issue to be able to write the blockId in the csv file as well, see here :
[https://gitlab.kitware.com/paraview/paraview/-/issues/19789#note\_719428](https://gitlab.kitware.com/paraview/paraview/-/issues/19789#note_719428)
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### Author:  [@Andrey](https://discourse.paraview.org/u/Andrey)
#### Post date: [June 22, 2020, 8:02pm UTC](https://discourse.paraview.org/t/save-multiblock-data-to-csv/4634/3 "2020-06-22T20:02:50Z")
Dear Mathieu,
thank you for the answer.
The information about the block Id will actually be very useful. Looking forward to the new release.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [June 23, 2020, 1:38am UTC](https://discourse.paraview.org/t/save-multiblock-data-to-csv/4634/4 "2020-06-23T01:38:49Z")
I’m afraid the block Id issue has not been funded yet so it is not prioritized. Let us know if you would be interested with that.
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### Author:  [@Andrey](https://discourse.paraview.org/u/Andrey)
#### Post date: [June 23, 2020, 8:53am UTC](https://discourse.paraview.org/t/save-multiblock-data-to-csv/4634/5 "2020-06-23T08:53:41Z")
Yes indeed, I believe that the block Id will be useful for further data post-processing.
In addition, it will be a smooth transition from saving each block in a separate file to saving all blocks in one.