[HELP] AMR categories problem

I have brought AMR and after reading related threads i tried to add wide range of categories in the field "comma delimited categories" and when i click ok it pop up an message saying
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? Minimum 3 characters required per comma delimited category?

can any one help in this matter

thanks in advance.
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Maybe you added some categories with less than 3 chars?...

I got the same answer from the AMR Support team, and thanks for your input

or you might have 2 commas in a row menain "" is your kw