# Problems reading Ensight Case Gold file exported from Ansys Fluent
**URL:** https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902
**Category:** ParaView Support
**Created:** [July 7, 2025, 12:36pm UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902 "2025-07-07T12:36:49Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@enrisang](https://discourse.paraview.org/u/enrisang)
#### Post date: [July 7, 2025, 12:36pm UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902/1 "2025-07-07T12:36:49Z")
Hi,
I am running fluid dynamics simulations with ANSYS Fluent. I usually export the results to Ensight Case Gold in ASCII format and post-process them successfully in Paraview 5.13. However, when I try to export the results in binary format (still in Ensight Case Gold) to reduce their size, I can’t open them in Paraview, and I get these errors:
I saw that this topic [has already been discussed](https://discourse.paraview.org/t/getting-byte-order-could-not-be-determined-error-when-opening-up-ensight-case-gold-files-written-from-ansys-fluent-2021r2/12250) on this forum.
Can you tell me if a solution to this problem has been found or implemented, or if I can just export the results in ASCII format?
Thanks!
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 7, 2025, 12:58pm UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902/2 "2025-07-07T12:58:20Z")
Same answer as the other thread:
This will requires some contribution, either from a dev spending some time or from a someone funding the issue.
Do not hesitate to reach out to Kitware if you are interested by that.
[https://www.kitware.com/](https://www.kitware.com/)
[https://discourse.paraview.org/t/how-are-features-and-bug-fixes-incorporated-into-paraview/4735/3](https://discourse.paraview.org/t/how-are-features-and-bug-fixes-incorporated-into-paraview/4735/3)
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [July 7, 2025, 2:22pm UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902/3 "2025-07-07T14:22:53Z")
Hi @enrisang, could you try out ParaView 6.0.0-RC1 and load the new EnSightGoldCombined reader plugin (Tools menu → Manage Plugins…). This is a new reader, perhaps it supports this file properly.
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### Author:  [@enrisang](https://discourse.paraview.org/u/enrisang)
#### Post date: [July 7, 2025, 3:02pm UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902/4 "2025-07-07T15:02:27Z")
Hi @cory.quammen, thank you for your tip! I tried with ParaView 6 and actually succeeded in opening the Ensight Case Gold file. However, it only allowed me to load the geometry of the CFD domain; all the point arrays and the measured particles part were not loaded. These are the warnings/errors that I got:
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### Author:  [@Trupenparikh](https://discourse.paraview.org/u/Trupenparikh)
#### Post date: [December 9, 2025, 12:37pm UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902/5 "2025-12-09T12:37:12Z")
@enrisang Found the solution for this if the problem you have is [same](https://discourse.paraview.org/t/getting-byte-order-could-not-be-determined-error-when-opening-up-ensight-case-gold-files-written-from-ansys-fluent-2021r2/12250/17).
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### Author:  [@enrisang](https://discourse.paraview.org/u/enrisang)
#### Post date: [December 9, 2025, 3:31pm UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902/6 "2025-12-09T15:31:55Z")
@Trupenparikh Thank you! I tried your solution and was able to read Ensight Case Gold files in binary format. However, I still have the same problem when I also export particle history data:
I tried to change the file reader, using EnSight Gold Combined Reader in Paraview 6.0, but it didn’t work:
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### Author:  [@Trupenparikh](https://discourse.paraview.org/u/Trupenparikh)
#### Post date: [December 10, 2025, 8:06am UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902/7 "2025-12-10T08:06:12Z")
@enrisang No idea on this one. Maybe Chatgpt could help.
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### Author:  [@Giovanni\_Cutuli](https://discourse.paraview.org/u/Giovanni_Cutuli)
#### Post date: [July 29, 2026, 12:24pm UTC](https://discourse.paraview.org/t/problems-reading-ensight-case-gold-file-exported-from-ansys-fluent/16902/8 "2026-07-29T12:24:02Z")
Hello! Even if this is a 1 year old topic, i figured i could follow up on this issue since i got the same problem and managed to resolve it. Apparently, the binary parser struggles with thread IDs higher than 65000 and yields this error. Changing the export format to ASCII worked for me, even if it inherently slowed the reader. Another possible solution could be changing the thread IDs to be lower than 65000.