I encountered an error while using the "Add raster value to point" SAGA-GIS module in QGIS (2.16) to retrieve altitude values from a raster DEM previously interpolated from TIN points (as vector features).
I use SAGA-GIS version 2.3.1.
This bug is fully reproducible for me.
I've selected an other points layer in the first field of the module window.
The raster DEM in the the second field.
The interpolation method was set to " Nearest neighbor".
File saved to /temp
[x] Open output file after running algorithm.
Here is the log:
The same operations are working on SAGA's side.