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Ensure both Arma 2 and OA files are installed in your server directory. This is often handled by Twisted Servers upon setup or through an “Update/Verify” button in TCAdmin2.
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Command-Line Parameter: In the TCAdmin2 “Command Line Settings,” you can combine them by using something like:
(The exact mod path might differ; adapt as needed.)
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Check the main Arma 2 knowledge base for any additional mod or config overlap.

