Why can't you run multiple instances of it?

Two reasons:

  1. Each instance would be trying to process the same files.

    Which would mean lots of "file in use" errors and/or duplicated results.

  2. The multiple instances would be trying to redirect their output to the same file.

    Even if you use append (>>), Windows won't let you do that. Not sure if *nix will?

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In reply to Re^2: Search through multiple files and output results to new file by BrowserUk
in thread Search through multiple files and output results to new file by Moloch

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