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numbers not placeable

I am a relatively new user of CAT Tools and I am using the 30-day free trial of Studio 2019. I am translating an editable PDF (not scanned). None of the numbers in the source text are underlined as placeable. I am using a TM, and in settings the box to recognize numbers is checked. Is there something else I have to do? It shouldn’t be a matter of telling Windows to recognize international number formats, because it doesn’t recognize years or footnote numbers, nothing.

Do I have to add a method of recognizing numbers to a variable list? I am unable to download any apps because I am on the free trial. Sorry if I am overlooking something basic.