'Why I cannot do TIN Interpolation in QGIS?

I want to do TIN Interpolation on a layer but when I fill all the fields with the right data (vector layer, interpolation attribute, extent etc) the algorithm does not run and shows me this message:

Traceback (most recent call last): File "C:/PROGRA~1/QGIS 3.14/apps/qgis/./python/plugins\processing\algs\qgis\TinInterpolation.py", line 188, in processAlgorithm writer.writeFile(feedback) Exception: unknown Execution failed after 0.08 seconds

Does anybody have an idea about it?? Thank you



Solution 1:[1]

I had the same issue. I converted a dxf file into a shape file and then I tried to use Tin interpolation but it didn't work. Then I realized that, in my dxf file, there were some very very small lines and polyline and, after removing them, the interpolation went just fine. I don't really have an explanation but maybe this could help you.

Solution 2:[2]

It is because of some small lines that are in your file that cannot be handled by Interpolation. You can use Generalizer3 in QGIS plugins to remove those lines.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Teresa
Solution 2 wuerfelfreak