HB Thermal Load Balance Error “Need more than 4 values to unpack”

grasshopper honeybee
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1

Hi,
I am trying to go do HB Thermal Load Balance but I am getting an error - “1. Solution exception:need more than 4 values to unpack”. When I input value from HB read room energy.

Can someone please help?

Hi found a similar query in the forum but that also didn’t help. “LoadBalance Error "Need more than 4 values to unpack"”

I have attached the image, Internalised the geometry, and kindly update the epw file if needed. The epw file is big to be uploaded.

Screenshot (680)
Screenshot (680)1920×1080 340 KB

Energy analysis_05.gh (132.8 KB)

1 Like
2

Hi everyone,
I have the same problem which the newest version of Ladybug can someone please help? Pranav did you find a solution?

3

Not all the geometry was internalized, but in order to get the fae_energy_flow output you need to include the sim_outputs and sim_par definitions, like so:

Screenshot 2025-03-08 064949
Screenshot 2025-03-08 0649491426×1265 158 KB

-A.

4

thank you for your reply Abraham, sadly I have an issue with the HB thermal load balance.

The error code is: 1.Solution exception:need more than 4 values to unpack

I used the HVAC Ideal Air and I am currently on 1.8.1. When using on 1.8.0 the script ran perfectly fine. Any idea on what the issue could be here ? Thanks a lot in advance.

WhatsApp Image 2025-03-08 at 11.59.16
WhatsApp Image 2025-03-08 at 11.59.161571×998 198 KB

5

Without the script it’s hard to say and help.
-A.

6

I would be happy to send it to you,but it says new users cant upload documents? How can i upload it ?

Thank you.

7

You can post a link to download it.
-A.

8

Sure thing here you go:

update as of the ladybug tools with 1.8.0 this script is working with 1.8.1 components only the load balance is causing an issue.

9

Next time please send a simplified version of the script.
I filtered the model to just simulate one of the floors.
See the red marks. You need to set the outputs to true, you need to connect the necessary outputs to the balance component.
After that is runs fine on my computer.
-A.
Lecture_11_HVAC, Settings and Results_Grasshopper file_AY.gh (344.4 KB)

2 Likes
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Hi Abraham,

thank you so much for your help. Highly appreciate it! I apologize for the long script ill keep that in mind for the next time.

Its working fine now thank you.
-N.

11

Hi both, I’m having the same kind of issue on version 1.9.0. I’m wondering if you could help me. I created a very simple script.

Thanks!
HB_ThermalLoadBlanceError_1.9.0.gh (49.1 KB)

12

Thanks for bringing this up, @Pranav_Prasad, @Ni7cksurf , and @ajassoi .

Even though these are all cases where you will not be able to build a complete load balance because you are missing the het flow through the envelope, you should not be getting a cryptic message like “Need more than 4 values to unpack.” It looks like I introduced the possibility of getting this message when I added the option to get envelope loads for detailed faces as I mentioned in the LBT 1.9 release notes.

I just pushed a fix so that you will no longer get the cryptic exception for this case:

… and I added a more helpful warning about the need to connect the face energy flow:

image
image1644×685 85.2 KB

You can get the change on your end now with the LB Versioner. Given that this issue only affected the error message and isn’t a serious blocking bug and only affects the warning message, I’m not going to update the LBT 1.9 Food4Rhino installer for this but it will be reflected in the Pollination single-click installers, the development version that people can get with LB Versioner, and (of course) LBT 1.10 when it eventually happens.

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