Last Updated on December 8, 2020 by Ian McEwan
One of the most effective ways to create digital designs is by using AutoCAD. Professionals such as engineers, urban planners, project managers, graphic designers, and architects use this software. While editing your graphics rendering, you might delete it by mistake, or other reason will cause the failure of opening the drawings. Should this happen, there’s no need to worry. Here you will learn how to recover AutoCAD files which are lost/deleted/corrupted/damaged.
Aside from accidental deletion, there are a number of reasons that may lead to loss of your AutoCAD files. They include the following.
a) System failures and virus infections
b) Crashing of your computer
c) Accidentally deleting your files or emptying the recycle bin
d) Removing external drives incorrectly while saving AutoCAD files to the computer.
e) Bad sectors on the hard drive or other computer hardware problems
f) Power failures or surges
g) Software problems
h) User mistakes
Using AutoCAD data recovery software is definitely the most efficient method you can use to recover AutoCAD files.
And one of the best AutoCAD data recoveries is Aiseesoft Data Recovery, which can help you recover AutoCAD file in any situation, no matter it was deleted/corrupted/unsaved/formatted or just got lost due to system crash/ virus attack/ Power Outage.
Also, Aiseesoft Data Recovery can help you recover more than 300 kinds of documents and files from your memory card, hard drive, USB flash drive, and other removable disks and drives.
Let’s look at the process of recovering your AutoCAD Drawing files using Aiseesoft Data Recovery software in steps.
Although deep scan will take more time and you can recover your desired drawing when the AutoCAD files start showing up during the scan process, it is wise to wait until the deep scanning process is complete.
Drawing Recovery Manager was originally introduced in AutoCAD 2006.
Since then, every time your AutoCAD crash or system failure occurs, the Drawing Recovery Manager will open the next time you start AutoCAD.
It will display a list of all the drawings which were active when the program fails, alongside with the associated Backup (.bak) Files and Automatic Save (.sv$) Files.
According to the level of the drawing node, you can double-click the drawing you want to recover to open in that interface under Backup Files. Also, those corrupted/damaged drawings will be repaired automatically in this step.
If the Drawing Recovery Manager does not show up, you can manually open it by clicking Application menu >Drawing Utilities > Open the Drawing Recovery Manager
Note: Recovering AutoCAD files with Drawing Recovery Manager will only work with those files which were saved before. Drawing Recovery Manager will not track those unsaved drawing files when the program crash.
To cut a long story short, you can recover AutoCAD files by simply renaming the.sv$ /.bak extension to .dwg and opening the renamed file in AutoCAD, if AutoCAD crashes or is otherwise abnormally terminated during a session.
But it only works if you have and able to locate the Automatic Save (.sv$) Files/ Backup (.bak) Files.
-Location of AutoCAD autosave files
For Windows user, you can launch the AutoCAD application, go to tools then to Options. Under Options, proceed to the “files” tab. There, click on Automatic Save File Location and check the location of the autosave files. Or you can use the SAVEFILEPATH variable.
Normally, the program will save “sv$” files in “C:\Users\ (your user name) \AppData\Local\Temp“.
For Mac user, you can simply found this under the Application tab in Preferences.
-Location of AutoCAD Drawing backup files
The file is saved in the same location as the original .dwg file by default, with the same name and a .bak extension.
Once you navigate to the folder, search for your CAD file by name though it will be of different extension. It will be either BAK or SV$. Check the modified dates of the files, and if they go in line with the deleted or lost CAD file, change the file extension from BAK or SV$ to .dwg.
According to knowledge.autodesk.com.
“…backup files are always one version older than the currently saved drawing…” “The autosave file will contain all drawing information as of the last time autosave ran.”
So, if you want to get back your work after the last QSAVE, SAVE, SAVEAS or autosave, you should turn to Method 1 rather than Method 3.
This is another easy method you can use to recover your AutoCAD files. Launch a new drawing and choose File. Proceed to select drawing utilities and then select “recover”. Afterward, select the image from the dialog box and then click OK.
Q: Does .DMP file which was created from AutoCAD Crash contains all my drawing info and can it be recovered from AutoCAD environment?
A: No. DMP only shows the process log. It cannot be used to recover your AutoCAD drawings back.
Q: Can Temporary (.ac$) Files be used to recover AutoCAD drawing file?
A: No, according to the knowledge.autodesk.com. “Temporary (.ac$) Files only exist during an AutoCAD session…” “.ac$ file contains information that is used by various AutoCAD commands, such as UNDO,…” Although some .ac$ files are left behind after AutoCAD crashes or is abnormally terminated, you cannot recover AutoCAD drawing file with it, because Temporary (.ac$) Files “do not contain any drawing data that can be recovered.”
Q: What is the different between .bak files, .sv$ files and .ac$ files?
Backup (.bak) Files
These are files which are designed to facilitate a backup. Every time that the software automatically saves your AutoCAD project, the .bak file is created. According to default settings, it is stored in the same location as your drawing .dwg file. It also has the same name as your drawing. However, the file extension is different. It is an exact copy of your AutoCAD project. Therefore, you can use it to get back an accidentally deleted image. Simply find the .bak file and change its extension to .dwg. After that, open up the file in Aut0CAD and you will have restored your deleted project. For you to use the .bak file, your software needs to have the SAVEBACK set to 1.
Automatic Save (.sv$) Files
This is an AutoCAD file which saves your work automatically. This software has an Autosave feature turned on by default. If your drawing is modified in any way since its last save, the Autosave feature keeps track and stores a backup. If you should lose a drawing accidentally, you can retrieve it through the .sy$ file. Simply begin by locating it In Windows, this file is located in a folder named Automatic Save File Location. In Mac, this file is found in a folder known as Autosave. After you locate the autosave file, change its extension from .sy$ to .dwg. After that, open the file in AutoCAD. This will restore your image.
Temporary (.ac$) Files
This type of file is essentially a temporary file for AutoCAD. It has a .ac$ extension. This file stores all the settings and edits which you make while creating an AutoCAD drawing. It also facilitates commands such as UNDO. If you lose a drawing due to an abnormal incident such as a crash or unwanted termination, you need this file to get the project back. As you pursue the .bak or .sy$ method, make sure that the.ac$ file is intact. This way, you can be sure that the project will be restored in the form that you had set. Furthermore, your progress will be intact.