I have hundreds of wall types. Most of them need a material change because the paint manufacturer (hence, the paint color) is other now.
I’ve already configured the new materials, and I figured this: first I retrieve all the walls materials, then filter the ones with matching marks, then when I get ex. material 307 manufacturer X I replace for material 307 manufacturer Y.
However I could even get values for Mark and Manufacturer parameters, as the pic shows. The error is “Warning: Internal error, please report: Dereferencing a non-pointer.”
I appreciate any help