I very often create my own projects and use the sdlxliff files provided in customer packages. However, when the sdlxliff files come from TBM created packages and I create my own project using these, I do get "dependency not found" for bigger files. In this case these are Word files. I can show Trados the source files and the error message goes away. But when I close Trados and open it again, the error appears again. This is very annoying and happens ony with TBM files.
