Incorrect file extension: In most cases, this problem occurs because the Excel file you are trying to open has a different file extension than the one you just connected. This can be done automatically after file conversion or manually after user intervention. If this scenario is true, you can fix the problem by manually replacing the extension with the correct one. Here`s what you need to do to open the file with a 3rd party equivalent: Users can then choose whether or not to open the Excel file. However, users have stated that their spreadsheet files have lost all their data when they click Yes to open. If you need to fix the same error, check out some of the solutions below. It turns out that the “File format and extension of Do Not Match” error can also occur because it is blocked at the property level. This is a typical event with files downloaded from the Internet or received via email attachments as a security option. If none of the above formats work or you are looking for another solution to the problem, proceed to the next method below.
Accidentally renamed If you or someone you know accidentally renamed the file with an incorrect filename extension, you can safely open the file. Then save the file in the file format with the appropriate file name extension. Source: IBM Support> “The file you are trying to open. format other than specified by file extension” when running standard reports in XLS format with Excel 2007 (or later) The Excel file is locked: If you received an Excel file after downloading it from an email attachment, there is a good chance that the file is locked in the properties. Many email providers automatically block it today for security reasons. In this case, you can fix the problem automatically by unlocking the file from the Properties menu. However, if my colleague downloads the same files from the same source, Excel opens empty and does not offer the possibility to trust the source. I tried to figure it out by checking the trust settings, but I couldn`t find anything to enable this pop-up for it. Before you click Yes to open the file, consider why the file name extension may be incorrect in the file. Step 1: Open File Explorer > View tab > Check File Name Extensions option. Protected views enabled: there is also a new security option that can prevent the main Excel application from opening some files that we received as attachments. In this case, the problem can be solved by going to the Excel settings and disabling “Protected Views” in the Trust Center menu.
If this scenario is true, you can easily fix the problem by going to the properties screen of the file that triggers the error message and unblocking it from the Security tab. Step 3: Once OpenOffice Calc is installed, right-click on the file you are having problems with and select Open with > OpenOffice Calc. A problem with a file name extension can occur if a workbook that you want to open is unreadable and the contents no longer look like the expected file format. If a workbook is damaged, you can try repairing it before opening it. To restore a damaged workbook, see Repair a damaged workbook. To repair corrupted Excel spreadsheets, you can use the last backup or restore of the previous stable copy of the file or try to use Recovery Toolbox for Excel. With a very high probability, Recovery Toolbox for Excel can restore data .xlsx files to their original state before they get corrupted. “The file format and extension of the “document” does not match” error message when the user tries to open certain files in Microsoft Office, especially Microsoft Excel. All previously saved data will be deleted when you click the Yes button. When you open a file in Excel, you receive a message that states that the file name extension does not match the actual file format.
For example, the file has a file name extension .xlsx, but it is actually a text file and should have a file name extension .txt. If the problem is related to your computer or laptop, you should try using Restoro, which can scan repositories and replace corrupted and missing files. This works in most cases where the problem is due to system corruption. You can download Restoro by clicking the Download button below. It turns out that the “File format and extension of Do Not Match” error often occurs because a relatively new security option (Protected Mode) prevents the Excel application from opening some recovered files from attachments. If the file extension is incorrect, it may not open in the correct application. After that, you can copy all the data from the table and paste it into a blank Excel sheet using the keyboard shortcuts Ctrl+C and Ctrl+V. However, if the file that is experiencing the problem is not from a trusted source, do not select it to open it. Instead, scan the file with the antivirus program before trying to open it. Update: Warning, Internet files may contain viruses You can read all the information on the page. Since the demo is available, make a copy of your file and repair it. As I know, it shows an overview of repairable data.
I visited the link and downloaded the demo version of this software: www.stellarinfo.com/repair-excel-file.php Several affected users who have also encountered this issue have reported that they have managed to fix the problem by manually changing the extension (renaming) to various popular Excel formats until they find the right one. Here`s a quick guide on how to unlock Excel files that trigger “File format and extension of Do Not Match” errors on startup: Several affected users who also encountered this issue confirmed that they were finally able to open and edit the Excel file without encountering the “File format and extension of Do Not Match” error by installing a free Excel equivalent and thus opening the problematic file. Step 3: Change the extension to .xls, .xlsx, or .xlsm and try to open the Exel file after each rename. The error “File format and extension of Do not match” appears when the user tries to open certain files in Excel. Even if the user clicks Yes to open it, all information previously saved in this file will be deleted. The file is not compatible with Excel: it turns out that this problem can also occur because the file in which the problem occurs is not compatible with Excel. If you don`t trust the source, don`t open it. Do you still want to open it? However, as a first step, it is important to decide whether or not you trust the source of the file. .