climateprediction.net (CPDN) home page
Thread 'What does: "negative theta detected" mean?'

Thread 'What does: "negative theta detected" mean?'

Questions and Answers : Unix/Linux : What does: "negative theta detected" mean?
Message board moderation

To post messages, you must log in.

AuthorMessage
Drago75

Send message
Joined: 8 Jan 22
Posts: 9
Credit: 1,780,471
RAC: 3,152
Message 66274 - Posted: 30 Oct 2022, 10:16:09 UTC

My UBUNTU 20.04 Laptop R7-5800H with 16 GB ran a single HadSM4 at N144 unit which errored out after six minutes with the following report. Was this due to missing libraries which I meanwhile installed?

<core_client_version>7.16.6</core_client_version>
<![CDATA[
<message>
process exited with code 22 (0x16, -234)</message>
<stderr_txt>

Model crashed: ATM_DYN : NEGATIVE THETA DETECTED.
Model crashed: ATM_DYN : NEGATIVE THETA DETECTED.
Model crashed: ATM_DYN : NEGATIVE THETA DETECTED.
Model crashed: ATM_DYN : NEGATIVE THETA DETECTED.
Model crashed: ATM_DYN : NEGATIVE THETA DETECTED.
Model crashed: ATM_DYN : NEGATIVE THETA DETECTED.
Sorry, too many model crashes! :-(
13:13:23 (8405): called boinc_finish(22)

</stderr_txt>
]]>[/size]
ID: 66274 · Report as offensive     Reply Quote
Glenn Carver

Send message
Joined: 29 Oct 17
Posts: 1049
Credit: 16,432,494
RAC: 17,331
Message 66275 - Posted: 30 Oct 2022, 11:24:20 UTC - in response to Message 66274.  

It means the model has detected an error whilst it was running. It's not a problem with the system libraries. It means the model has detected unphysical values in temperature and stopped. It can happen with inappropriate initial values.
ID: 66275 · Report as offensive     Reply Quote
wateroakley

Send message
Joined: 6 Aug 04
Posts: 195
Credit: 28,330,034
RAC: 10,258
Message 66276 - Posted: 30 Oct 2022, 11:25:35 UTC - in response to Message 66274.  

My UBUNTU 20.04 Laptop R7-5800H with 16 GB ran a single HadSM4 at N144 unit which errored out after six minutes with the following report. Was this due to missing libraries which I meanwhile installed?
Model crashed: ATM_DYN : NEGATIVE THETA DETECTED.
]]>[/size]
The work unit will have crashed with NEGATIVE THETA due to an unfortunate choice of initial conditions. The crash is not due to missing libraries.
ID: 66276 · Report as offensive     Reply Quote
Drago75

Send message
Joined: 8 Jan 22
Posts: 9
Credit: 1,780,471
RAC: 3,152
Message 66279 - Posted: 30 Oct 2022, 23:41:40 UTC - in response to Message 66276.  

ok thanks...
ID: 66279 · Report as offensive     Reply Quote

Questions and Answers : Unix/Linux : What does: "negative theta detected" mean?

©2024 cpdn.org