How to Convert a Recent AutoCAD File to a Lower Version

If you’re working with an AutoCAD file created in a newer version, but you need to share it with someone using an older version, you’ll need to convert the file to ensure compatibility. AutoCAD offers built-in options for saving to older formats, but if the file cannot be opened due to version differences, Autodesk DWG TrueView provides a free alternative for conversion.

Why Convert AutoCAD Files to Older Versions?

When an AutoCAD drawing is saved in a newer file format, older versions of AutoCAD may display the following error message:

“Open Drawing – Incompatible Version. The drawing file could not be opened because it was created with a more recent version of AutoCAD.”

This situation often arises when collaborating with team members or clients who may not have access to the latest AutoCAD software. Converting the file to a previous version ensures seamless compatibility and avoids disruption.

Method 1: Using AutoCAD to Save to a Lower Version

If you can open the file in AutoCAD, the easiest method is to save it directly in an older file format. Here are the steps:

1. Open the DWG file in your current version of AutoCAD.
2. Click the Save As button on the Quick Access Toolbar or type SAVEAS in the command line.Tip: It’s a good idea to rename the file during this process to avoid overwriting the original version.
3. In the Save Drawing As window, locate the Files of Type drop-down menu.
4. Select the desired older AutoCAD version (e.g., AutoCAD 2013, AutoCAD 2010, AutoCAD 2007, etc.).
5. Click Save to save the file in the lower version.

Note: You can also set the default AutoCAD file format under the “Open and Save” tab in the Options menu. This ensures that future drawings are automatically saved in the format you need.

Method 2: Using DWG TrueView for Conversion

If the file you need to convert was created in a newer version that your AutoCAD cannot open, DWG TrueView, a free viewer provided by Autodesk, is an excellent tool to convert the file. Here’s how you can use it:

1. Download and Install DWG TrueView from the Autodesk website.
2. Open DWG TrueView and launch the application.
3. Click the Application Menu (upper-left corner) and select DWG Convert.Alternatively, you can find DWG Convert directly on the ribbon if a file is already open.
4. Add the file(s) you want to convert using the Add Files button (a green plus icon).
5. Choose the appropriate file format version from the available options.
6. Click Convert to save the file in the desired lower version.

Troubleshooting and Tips for File Conversion

• If you’re working with batch conversions, AutoCAD itself includes a command called DWGCONVERT, allowing you to convert multiple files to older formats simultaneously. This is helpful for large projects where you need to make several drawings compatible with older software versions.
• When converting to older formats, be mindful that certain features or objects in the drawing may not be fully supported in earlier versions, which could result in minor data loss or reduced functionality. Review the converted drawing carefully to ensure all elements appear correctly.

Common Issues When Converting Files

When saving files to an older format, some elements may not convert perfectly due to differences in how AutoCAD versions handle certain objects. Here are some common issues and tips for resolving them:

1. Loss of dynamic blocks or parametric constraints: Older versions of AutoCAD may not support certain advanced features, so these elements might not work as expected.Tip: After conversion, review dynamic elements to ensure their functionality.
2. Layer states and plot styles: Complex layer setups may require adjustment after converting a file, as older versions might handle these settings differently.Tip: Always double-check your layer states and plot settings to ensure they’re correct after conversion.
3. Hatch patterns and gradients: Some hatch patterns may not be supported in earlier versions, leading to incomplete or missing hatches.Tip: If hatching is critical, recreate or adjust hatches after conversion.

Conclusion

Converting AutoCAD files to older versions is an essential skill when working in collaborative environments or with legacy software. Whether you’re using AutoCAD’s built-in Save As function or DWG TrueView for converting files that can’t be opened, following these steps will ensure your files remain compatible across different versions of AutoCAD.

By understanding these tools and methods, you’ll minimize compatibility issues and ensure smooth collaboration with team members and clients using older versions of the software.