Found stitched object LOD textures from earlier TexGen generation
Detected LOD textures from an older TexGen version
No TexGen output detected
The message means that the TexGen output is not installed, incomplete or access to the data folder to check for the output is prevented by the OS, anti vir or 3rd party software.
Run TexGen before DynDOLOD to update a select list of object LOD textures and tree/grass LOD billboards to match the current load order. Make sure that Stitched Object LOD Textures and Rendered Object LOD Textures are checked.
Make sure TexGen completed the generation of object LOD texture and tree/grass LOD billboards successfully.
Verify the used data folder is correct.
The output from TexGen should never be overwritten by anything.
Ignoring the message is not recommended for best visuals and performance.