How to use other land cover maps (e.g. Corine), and their corresponding lookup tables to produce vegetation structure parameter maps

I get the following error when I make a vegetation structure parameter map with other land cover maps, but I don’t get any errors when I use the CCI_Landcover2015 vegetation structure parameter map. I don’t know what’s wrong, I’d like to get some help, thanks!

A landcover map needs an associated look-up table (LUT) and the plugin only provides one for CCI Landcover (see sections 2.1 and of the user manual). Did you try making a modification of the LUT to include the classes present in your map, including -9999?

Thank you very much for your answer. I have successfully solved the problem because the NODATA is -9999, but I didn’t set it in the LUT.