Create and Restore Backup Files
files help ensure the safety of your drawing data. If a problem
occurs, you can restore a drawing backup file.
hardware problems, power failures or surges, user mistakes, or software
problems can cause errors in a drawing. By saving your work frequently,
you can ensure a minimum of lost data if your system fails for any reason.
If a problem occurs, you can restore a drawing backup file.
Use Backup Files
In the Options dialog box, on the Open and Save
tab, you can specify that backup files are created when you save
drawings. If you do, each time you save a drawing, the previous
version of your drawing is saved to a file with the same name and
a .bak file
extension. The backup file is located in the same folder as the
revert to your backup version by renaming the .bak file in
Windows Explorer to a file with a .dwg extension.
You may want to copy it to a different folder to avoid overwriting
your original file.
Save Your Drawing Automatically at Specified Intervals
If you turn the automatic save option on, your
drawing is saved at specified time intervals. By default, files
saved automatically are temporarily assigned the name filename_a_b_nnnn.sv$.
- Filename is
the current drawing name.
- a is
the number of open instances of the same drawing file in the same work
- b is
the number of open instances of the same drawing in different work sessions.
- nnnn is
a random number.
files are automatically deleted when a drawing closes normally.
In the event of a program failure or a power failure, these files
are not deleted.
a previous version of your drawing from the automatically saved file,
rename the file using a .dwg extension in place of the .sv$ extension before
you close the program.
restore a drawing from a backup file