AutoCAD

How to Open Backup File in AutoCAD 2018?

Steps to Open a Backup File in AutoCAD 2018

When working in AutoCAD, backup files can be a lifesaver, especially if your main file becomes corrupted or unsaved changes were lost. If you have a .BAK file and need to access it in AutoCAD 2018, follow these detailed steps:

Step 1: Locate the BAK File

Start by finding your .BAK file on your computer. These files are typically stored in the same directory as the original drawing file, usually alongside .DWG files.

Step 2: Create a Copy

Before making changes, it’s advisable to create a copy of the .BAK file to avoid any risk of data loss. Right-click on the .BAK file and select “Copy.” Then, navigate to your desktop (or any preferred location) and paste the copied file.

Step 3: Rename the File

To open the backup file in AutoCAD, you need to change its file extension from .BAK to .DWG. Right-click on the copied file, select “Rename,” and modify the file name so that it ends with .DWG instead.

Step 4: Confirm the Extension Change

Once you rename the file, a prompt will appear asking for confirmation regarding the change of file extension. Click “Yes” to proceed. This modification enables AutoCAD to recognize the file as a drawing file.

Step 5: Open the Renamed File in AutoCAD

Launch AutoCAD 2018. Click on the “File” tab in the top-left corner, then choose “Open.” Navigate to your desktop and find the renamed .DWG file. Select it and click “Open.” The file will now load in AutoCAD, allowing you to work on it as needed.

Additional Methods for Accessing Backup Files

Using the Drawing Recovery Manager

If AutoCAD 2018 crashed or you experienced a system failure, you can also access your backup files through the Drawing Recovery Manager. Here’s how:

  1. Click on the Application menu (the big ‘A’ in the top-left corner).
  2. Select “Drawing Utilities” from the dropdown.
  3. Choose “Open Drawing Recovery Manager.”
  4. Browse the list of recoverable drawings under “Backup Files” and select the one you wish to recover.

Accessing AutoCAD Autosave Files

Backup files are not the only type AutoCAD generates. Autosave files (with the .SV$ extension) can also be beneficial. To find and open these files:

  1. Go to the “Files” tab in the Options dialog.
  2. Check the “Automatic Save File Location” to see where the autosave files are stored.
  3. Navigate to that folder and look for the most recent .SV$ file, which can be renamed to .DWG to open in AutoCAD.

Frequently Asked Questions

1. Can I recover unsaved changes in AutoCAD 2018?

Yes, AutoCAD offers a Drawing Recovery Manager that can help recover unsaved files after a crash. You can access this manager through the Application menu.

2. What is the difference between .BAK and .DWG files?

A .BAK file is an automatic backup generated by AutoCAD while you work, whereas a .DWG file is the main drawing file that contains all data and design work. The .BAK file is a copy of the most recently saved version of the .DWG file.

3. What should I do if the .BAK file doesn’t open in AutoCAD?

Make sure you have correctly renamed the file from .BAK to .DWG. If the file still doesn’t open, it might be corrupted. In such cases, try using the Drawing Recovery feature or check if there are older versions available in the backup directory.

About the author

Wei Zhang

Wei Zhang

Wei Zhang is a renowned figure in the CAD (Computer-Aided Design) industry in Canada, with over 30 years of experience spanning his native China and Canada. As the founder of a CAD training center, Wei has been instrumental in shaping the skills of hundreds of technicians and engineers in technical drawing and CAD software applications. He is a certified developer with Autodesk, demonstrating his deep expertise and commitment to staying at the forefront of CAD technology. Wei’s passion for education and technology has not only made him a respected educator but also a key player in advancing CAD methodologies in various engineering sectors. His contributions have significantly impacted the way CAD is taught and applied in the professional world, bridging the gap between traditional drafting techniques and modern digital solutions.