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==== <span id="StrictOOXMLNotSupportedException">XLSX file in Strict Open XML format</span> ====
We do not support files with the ''XLSX'' extension that were saved with the ''Strict Open XML'' format. We recommend that:
* Try to save the file using the standard format of Excel. See how [[Saving as Save File Supported Format|here]];
==== <span id="InvalidXLSFormatException">XLS file is in an invalid format</span> ====