SUEWS Simple in QGIS Crashes After Data Fields Auto-Changing

[reeveugm]

Hi everyone, I’m experiencing an issue when trying to run SUEWS Simple using the UMEP and UMEP for Processing plugins in QGIS.

I entered all the required input parameters—coordinate conditions (which I calculated myself), forcing data directory, and output folder—into the SUEWS Simple window. Everything looks normal at first (as shown in the screenshot).

When I click Run, a small progress window appears (which I assume is normal), like this.

but then the SUEWS Simple form suddenly changes. The values I previously entered are replaced with something that looks very similar to the data from “Add settings from test dataset”, even though I never clicked that option.

After 2–3 seconds, QGIS completely crashes and closes.

Has anyone experienced this issue?
What could be causing the input fields to change automatically right before the crash?
Is this due to a bug, a data formatting issue, or something wrong with my setup?

Any insight or troubleshooting suggestions would be greatly appreciated. Thank you!

[reeveugm]

I have repeated this process many times and even reinstalled the UMEP plugins, but the same issue keeps happening.
For context, I successfully ran SUEWS Simple around May–June 2025 on this same plugin without encountering this problem.

[biglimp]

Do you also get a crash using the default dataset?
What version of QGIS are you using?

[reeveugm]

The simulation does not crash when I use the default test dataset. I only know it by the graphs that appear after QGIS freezes for a moment. I am currently using QGIS Long Term Release Desktop 3.40.12 Bratislava.

[biglimp]

Thanks. Then this is probably a bug in the code. I will transform this discussion to an issue and we can try to solve this.

[reeveugm]

Alright. Thank you very much