| You are trying to duplex on unsupported paper.
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| Verify that the paper is supported for duplex printing.
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| The printer driver is not set up for duplex printing.
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| Set up the printer driver to enable duplex printing.
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| The first page is printing on the back of preprinted forms or letterhead.
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| Load preprinted forms and letterhead in Tray 1 with the letterhead or printed side down, with the top of the page leading into the product. For Trays 2, 3, and 4, load the paper printed side up with the top of the page toward the front of the product.
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| The product model does not support automatic 2-sided printing.
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| The HP LaserJet P3011, HP LaserJet P3015, and HP LaserJet P3015n models do not support automatic 2-sided printing.
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| The product configuration is not set for duplexing.
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| In Windows, run the automatic configuration feature:
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| 1.
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| Click the Start button, point to Settings, and then click Printers (for Windows 2000) or Printers and Faxes (for Windows XP).
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| 2.
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| Right-click the HP product icon, and then click Properties or Printing Preferences.
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| 3.
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| Click the Device Settings tab.
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| 4.
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| Under Installable Options, click Update Now in the Automatic Configuration list.
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| Duplex printing is turned off.
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| 1.
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Open each of the following menus. Press the down arrow  to highlight it and then press the OK button to select it.
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| 2.
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