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How to Fix Altium File Type Not Recognized Error

Altium Designer is a powerful tool for PCB design that supports various file types and extensions. However, sometimes you may encounter an error message that says "Altium file type not recognized" when you try to open a file. This can be caused by a wrong or missing extension, or a corrupted or incompatible content. In this article, we will show you some possible solutions to fix this error and open your files in Altium Designer.


Check the File Extension

The first thing you should do is to check the file extension of the file you are trying to open. Altium Designer uses different extensions for different types of files, such as .SchDoc for schematic documents, .PcbDoc for PCB documents, .Ddb for design databases, and so on. You can find the full list of supported file types and extensions on the [System - File Types page] of the Altium Designer documentation.

If the file extension is wrong or missing, you can try to rename it to the correct one and see if it opens in Altium Designer. For example, if you have a file named "myproject.pcb" that is actually a PCB document, you can rename it to "myproject.PcbDoc" and try to open it again.

Use the Import Wizard

If the file extension is correct but the file still does not open in Altium Designer, you can try to use the Import Wizard to convert it to a compatible format. The Import Wizard can import files from various sources, such as Protel, PADS, OrCAD, Eagle, and more. You can access the Import Wizard by clicking File > Import Wizard in Altium Designer.

The Import Wizard will guide you through the steps of selecting the source file, choosing the import options, and generating the output files. You can find more details on how to use the Import Wizard on the [Importing Design Files] page of the Altium Designer documentation.

Repair or Replace the File

If none of the above methods work, it is possible that the file is corrupted or damaged and cannot be opened by Altium Designer. This can happen due to various reasons, such as power failure, disk error, virus infection, or accidental deletion. In this case, you may need to repair or replace the file with a backup copy or a new version.

To repair a corrupted file, you can try to use a third-party tool that can recover or fix damaged files, such as [File Repair] or [Stellar Data Recovery]. However, these tools are not guaranteed to work and may not be able to recover all the data from the file.

To replace a corrupted file, you can try to find a backup copy or a previous version of the file that is still intact and use it instead. You can also try to contact the original author or source of the file and ask for a new copy or an update. Alternatively, you can try to recreate the file from scratch using Altium Designer or another tool.


In this article, we have shown you some possible solutions to fix the "Altium file type not recognized" error and open your files in Altium Designer. We hope this article was helpful and informative for you. If you have any questions or comments, please feel free to leave them below.


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