The Serial Number has already been used before and registered. Go to the File Menu, Settings and Check to Redo Registration Now. Exit the program and proceed with scanning.
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![Logo_Scan-Dimension_144x105.png]](https://kb.scandimension.com/hs-fs/hubfs/Logo_Scan-Dimension_144x105.png?height=50&name=Logo_Scan-Dimension_144x105.png){kind=logo}
The Serial Number has already been used before and registered. Go to the File Menu, Settings and Check to Redo Registration Now. Exit the program and proceed with scanning.