# CELS Contact Energy

**URL:** https://prepomax.discourse.group/t/cels-contact-energy/2762
**Category:** Bug Reports
**Created:** [June 9, 2025, 10:44am UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762 "2025-06-09T10:44:03Z")
**Posts on this page:** 10
**Page:** 1

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### Author: ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)
#### Post date: [June 9, 2025, 10:44am UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/1 "2025-06-09T10:44:03Z")

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Hi,

If have request diferent paramenters to be output in the history Output and they all show up but CELS.  
Prepomax 2.3.3. Surface to Surfae interaction.

Am I missing something?

 ![imagen](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/9/96d4ce536e4316526d429a3717d6d0edaf42fb98.png)  
 ![imagen](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/9/9c02c0a1901d9bd86f345cee3a0f37c17a8b96cd.png)

Regards

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### Author: ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)
#### Post date: [June 9, 2025, 11:05am UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/2 "2025-06-09T11:05:58Z")

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It seems to be a regression because it works for a simple test case in v2.3.0 but not in v2.3.4.

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### Author: ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)
#### Post date: [June 12, 2025, 12:02pm UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/3 "2025-06-12T12:02:44Z")

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I have fixed the history output reader. It will be included in the next release.

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### Author: ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)
#### Post date: [October 15, 2025, 2:49pm UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/4 "2025-10-15T14:49:17Z")

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Can you confirm the bug is solved?

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### Author: ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)
#### Post date: [October 17, 2025, 10:21pm UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/5 "2025-10-17T22:21:41Z")

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I still can’t see the contact energy.

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### Author: ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)
#### Post date: [October 18, 2025, 8:16am UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/6 "2025-10-18T08:16:24Z")

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![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/0/0bdc46617a26d4700457bcf9ed77733d96ae92ee.png)

For me, the history output looks like this.

But it is true that the CELS option is not included in the Field outputs. I will add it to the possible options.

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### Author: ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)
#### Post date: [October 30, 2025, 6:35pm UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/7 "2025-10-30T18:35:45Z")

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I have added support for CELS output to the field outputs. It was already there but commented for some reason that I did not write down. @FEAnalyst are you aware of any problems with the CELS field output?

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### Author: ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)
#### Post date: [October 30, 2025, 11:26pm UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/8 "2025-10-30T23:26:26Z")

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> [@Matej](#):
>
> @FEAnalyst are you aware of any problems with the CELS field output?

Only this thread: [CELS.Contact (Springs Energy) - CalculiX (official versions are on www.calculix.de, the official GitHub repository is at https://github.com/Dhondtguido/CalculiX).](https://calculix.discourse.group/t/cels-contact-springs-energy/2226)

But for me, it’s displayed on the whole surface:

 ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/5/53670f2afd9b3bbf377099109fb7b11e06dda3b5.png)

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### Author: ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)
#### Post date: [November 3, 2025, 7:55am UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/9 "2025-11-03T07:55:41Z")

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Thank you for testing this feature. It is also working for me.

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<div class="post-metadata">

### Author: ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)
#### Post date: [January 18, 2026, 5:22pm UTC](https://prepomax.discourse.group/t/cels-contact-energy/2762/10 "2026-01-18T17:22:23Z")

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