Excel cannot be open the file 'filename.xlsx' because the file format or file extension is not valid - Microsoft Community Hub
Solved: How do I fix "The file format and extension of" Microsoft Office Excel Document "Don't Match. The file could be corrupted or unsafe"
![The file format and extension of 'adxloader.Controller.ExcelLink.dll' don't match" when launching Excel The file format and extension of 'adxloader.Controller.ExcelLink.dll' don't match" when launching Excel](https://www.ibm.com/support/pages/system/files/support/swg/cogtech.nsf/0/d710a797dce6da6385257e3000317ac5/Symptom/0.84.gif)
The file format and extension of 'adxloader.Controller.ExcelLink.dll' don't match" when launching Excel
![ERROR: The file format and extension of don't match. the file could be corrupted or unsafe - Help - UiPath Community Forum ERROR: The file format and extension of don't match. the file could be corrupted or unsafe - Help - UiPath Community Forum](https://global.discourse-cdn.com/uipath/original/3X/d/9/d9777cbd72120ab0e14f5e8e3af9c2ddf2a9932b.png)
ERROR: The file format and extension of don't match. the file could be corrupted or unsafe - Help - UiPath Community Forum
![The file format and extension of 'CalcbenchExcelXLL64Packed.xll' don't match. The file could be corrupted or unsafe... – Calcbench The file format and extension of 'CalcbenchExcelXLL64Packed.xll' don't match. The file could be corrupted or unsafe... – Calcbench](https://knowledge.calcbench.com/hc/article_attachments/360042537554/mceclip0.png)
The file format and extension of 'CalcbenchExcelXLL64Packed.xll' don't match. The file could be corrupted or unsafe... – Calcbench
![The file you are trying to open ... different format than specified by the file extension" when running Standard Reports to XLS format, using Excel 2007 (or later) The file you are trying to open ... different format than specified by the file extension" when running Standard Reports to XLS format, using Excel 2007 (or later)](https://www.ibm.com/support/pages/system/files/support/swg/cogtech.nsf/0/dfb629813fce52f7852579ec002d3c78/Symptom/0.5E04.gif)