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I got it. The correct uniform type identifier for a tex file is public.tex (this is given by the kMDItemContentTypeTree key when running the command "mdls file.tex"). It is *not* "org.tug.tex", which is returned by Alfred when dragging a .tex file in the File Types window. It seems like this error should be corrected.

Thanks! I started a new workflow. The workflow works for all the types I specified except for .tex files. When dragging a .tex file in the File Types window of this workflow, I obtain a new line "org.tug.tex     TeX text file", but it does not seem to pick up any .tex files.  I also tried to add the type .tex manually in the File Types Windows to no avail. It seems there is something wrong with .tex files in particular. Any idea?

I want to see FileName.tex when I type FileName in the Alfred window. In Features > Default Results > Advanced, I have dropped a file with a .tex extension. Alfred still does not propose FileName.tex when I type FileName