ERROR Liquefaction Scenario OpenQuake: ZhuEtAl2015LiquefactionGeneral

[Ridho Alfi Mubarok]

Hello OpenQuake community,

I am running a scenario-based (event-based) analysis with secondary perils (liquefaction) using OpenQuake Engine WebUI version 3.24 on Windows, applying the ZhuEtAl2015LiquefactionGeneral model.

My setup is as follows:

• Analysis type: Scenario / Event-based

• Secondary perils: liquefaction

• Liquefaction model: ZhuEtAl2015LiquefactionGeneral

• Site model CSV includes additional parameters vs30 and cti

  However, during execution, the calculation fails with the following error:

  2026-02-06T16:17:16.28,INFO,SpawnProcess-11/10644,min_iml=[1.e-10]

2026-02-06T16:17:16.37,INFO,SpawnProcess-11/10644,Reordering the ruptures and storing the events

2026-02-06T16:17:16.43,INFO,SpawnProcess-11/10644,Reading 1 ruptures

2026-02-06T16:17:16.44,INFO,SpawnProcess-11/10644,Affected sites ~1499 per rupture, max=1499

2026-02-06T16:17:16.45,INFO,SpawnProcess-11/10644,maxw = 2

2026-02-06T16:17:16.58,WARNING,SpawnProcess-11/10644,Sent 1 event_based tasks, 147.45 KB

2026-02-06T16:17:29.84,INFO,SpawnProcess-11/10644,Received 1 * 78 B in 13 seconds [unpik=0.00s] from event_based {'tot': '78 B'}

2026-02-06T16:17:29.88,ERROR,SpawnProcess-11/10644,AttributeError: File "C:\Users\lenovo\AppData\Local\Programs\OpenQuake Engine\python3\Lib\site-packages\openquake\baselib\parallel.py", line 437, in new val = func(*args) ^^^^^^^^^^^ File "C:\Users\lenovo\AppData\Local\Programs\OpenQuake Engine\python3\Lib\site-packages\openquake\calculators\event_based.py", line 273, in event_based yield _event_based(block, cmaker, stations, srcfilter, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\lenovo\AppData\Local\Programs\OpenQuake Engine\python3\Lib\site-packages\openquake\calculators\event_based.py", line 228, in _event_based df = computer.compute_all(None, max_iml, mmon, cmon, umon) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\lenovo\AppData\Local\Programs\OpenQuake Engine\python3\Lib\site-packages\openquake\hazardlib\calc\gmf.py", line 372, in compute_all self.update(data, result, rlzs, ms[0], max_iml) File "C:\Users\lenovo\AppData\Local\Programs\OpenQuake Engine\python3\Lib\site-packages\openquake\hazardlib\calc\gmf.py", line 291, in update o = sp.compute(mag, zip(self.imts, gmfa), self.ctx) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\lenovo\AppData\Local\Programs\OpenQuake Engine\python3\Lib\site-packages\openquake\sep\classes.py", line 226, in compute pga=gmf, mag=mag, cti=sites.cti, vs30=sites.vs30) ^^^^^^^^^ File "C:\Users\lenovo\AppData\Local\Programs\OpenQuake Engine\python3\Lib\site-packages\numpy\core\records.py", line 455, in __getattribute__ raise AttributeError("recarray has no attribute %s" % attr) from e AttributeError: recarray has no attribute cti.

For reference, I am attaching the configuration file (*.ini) and the site model CSV used in this scenario-based analysis.

I would greatly appreciate any guidance on how to resolve this issue so that the liquefaction modeling can run successfully.

Thank you very much for your help.

[Lana Todorovic]

Dear user,

Please check the demos file and specifically how to format the site_model.csv (I think the error lies in the way your csv file is formatted):

https://github.com/gem/oq-engine/tree/master/demos/hazard/EventBasedLiquefaction 

Should you experience any further issues, please do attach the input files so I can further inspect. 

Hope this helps,
Lana

[Ridho Alfi Mubarok]

The CSV data I used contain CTI and Vs30 parameters, which have been adjusted to meet the input requirements of the liquefaction model I selected, namely the Zhu et al. (2015) Liquefaction General Model. The data format has also been adapted based on the demo file you previously recommended. In addition, I have tried using several different versions of the OpenQuake Engine, but I continue to encounter the same error message. Therefore, I am attaching the input file I used for further review, in order to verify its compliance with the model specifications and OpenQuake Engine requirements. Thank you for your time and assistance.

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[Lana Todorovic]

Dear User,

Many thanks for sharing the inputs. As you pointed out, the site_model.csv file is formatted correctly. What could resolve you issue is removing this part from your job.ini file:
[Hazard sites] region_grid_spacing = 5 region = 126.9 2.43, 129.3 2.43, 129.3 0.3, 126.9 0.3
I am attaching the slightly modified job.ini file. Let me know if other issues appear.

Best regards,
Lana

[Ridho Alfi Mubarok]

  Thank you very much for the tips and suggestions you provided. They were very helpful and successfully resolved the issue I encountered.  

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