There’s a bug with Multi Exporter’s texture library generation. Once a folder contains a blank space, it won’t create the corresponding XML files for the textures. Example:
[TEXTURELIB] Generating XML for texture 'E:\I Will Test\PackageSources\ls_modelLib\texture\Twotter_normal.tif' :
[TEXTURELIB][ERROR] Failed Twotter_normal.tif contains whitespace(s), so the XML will not be generated for it. Please remove them before regenerating.
Moving export to a different folder that has no spaces in any of the names fixes the problem. This is kinda inconsistent as all other SDK tools support folders with whitespaces and this error is also thrown if the texture file in question doesn’t contain any whitespaces.