Workbook Copy-Protection for Microsoft Excel
The "ETABS license not recognized error 120" is an error message that occurs when the ETABS software is unable to recognize the license file or the license is not valid. This error typically occurs when the user tries to launch the ETABS software.
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Office 2024 down to 2010 offer native 64-bit versions. XLS Padlock is an add-in for Excel, so it must match the same bitness as Excel.
In this article, Microsoft explains how to find the version and bitness of your Office installation
For instance, for Office 2016: start Excel. Open the File menu, and then select Account and click About Excel:
