Help Center

Search for answers to your questions by entering keywords below, or look through our knowledge base.

Incompatible DWG or DFX files


File Format Compatibility

AutoDesk 2018 upgraded the file formats for .dwg and .dfx. AutoDesk update their formats to provide improvements in the efficiency of open and save operations, especially for drawings that contain many annotative objects and viewports. Additionally, 3D solid and surface creation now uses the newest geometric modeler (ASM), which provides improved security and stability.

Here are the previous 3 file formats:

AutoCAD Release Native File Format
AutoCAD 2018 - AutoCAD 2020 AutoCAD 2018
AutoCAD 2013 - AutoCAD 2017 AutoCAD 2013
AutoCAD 2010 - AutoCAD 2012 AutoCAD 2010


NOTE: You can read more about the DWG Format Update here.


Importing Incompatible Files in MudShark

If you're using an older version of MudShark, you might come across an error like the following when importing a .dwg 2018 or .dfx 2018 file.


Example error message



Ensure you're using the latest version

AutoCAD 2018 is supported in MudShark 7.1, if you're facing issues with file compatibility, we recommend upgrading to the latest release. We can always test a file with the latest version of MudShard to ensure it loads.