Hi,
May I know the Fluent version you are using. Since Fluent uses the Chemkin libraries for mechanism import starting R17.0, the limitation of 6 product species is not applicable. Can you try to read in the mechanism without the MAXSP variable?
You can ignore the error message in the .out file for now. This message should be cleaned up the latest releases. I would recommend you to use the latest version of Fluent.
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