Not at all, but I almost desperate

[Anonymous]

My customer wanted to get .dwg file in time. But obviously it is not possible in couple of days. I am using AutoCAD 2018 and it couldn't open my graphic file yesterday evening, when almost all the work was almost finished. It viewed AutoCAD Internal Error. I've no idea what does it mean.

[Alfred.NESWADBA]

Hi,

>> It viewed AutoCAD Internal Error

Can you upload the DWG-file so we can take a look into it?

Can you please create a screenshot of that error message and show it to us?

What version of AutoCAD does your customer have.

Does the error message appear on his workstation or on your's?

- alfred -

[rkmcswain]

Can you view the file here, using Autodesk's online file viewer? If not, then it's probably corrupt.

• Go into the same folder as the DWG file, and look for the same named file, but with a .BAK file extension (You need to have file extension TURNED ON).
• This is the last save before your last save.
• Then rename that file from BAK to DWG and try that one.

• If that doesn't work, then go into your %temp% folder (in the address bar of Windows Explorer, type in %TEMP% and press enter).
• Sort by date and look for a file name similar to your original file, but with a .SV$ file extension.
• Rename that to .DWG and try it.
• This is your last Autosave file (it may not exist)

• If that does not work, look for the same named file in the %TEMP% folder with a .BAK file extension. 
• This will be your next to last autosave file. It may not exist either.
• If it does, rename it to .DWG and try to open it.

Use the AutoCAD online viewer to test for file validity.

[Anonymous · Accepted solution]

This guide was found from one of the similar problem like yours. After fulfilling all the steps, you could repair .dwg. If not some helpful resources would be effective in your complicated situation.

http://www.cad-addict.com/2009/07/autocad-use-autosave-files-to-recover.html

http://blog.jtbworld.com/2013/12/how-to-recover-and-fix-problematic-or.html

https://www.repairtoolbox.com/autocadrepair.html

1. Go to Tools --> Options
   2. Inside Options go to the “Files” Tab (far left)
   3. Inside the files tab go to: “Automatic Save File Location” and see where the autosave files are stored. (mine where stored at C:\Documents and Settings\USERNAME\Local Settings\Temp)
   4. Then access that folder and try to find a file with the same file name but different extension. (The autosave files should have a either a .BAK or a .SV$ extension) (if you can’t see the folder, you need to go to Tools --> folder Options --> View --> and Make sure "show hidden files and folders" is SELECTED) .
   5. Check the "date modified" of those files, if the date and time makes sense according to when you had the last file crshes, there is a good chance that those files contain the information you need, so there is no need to redraw everything.
   6. Change the file extension of the file you think it might be the good one from .bak or .sv$ to .dwg (to be able to change the file extension you need to be able to see it. To do that, on any folder go to Tools --> Folder Options --> View --> and make sure that "Hide extensions for known file types" is UNCHECKED)

If your auto-save feature is disabled, you can enable it in AutoCAD by going to Tools --> Options --> "Open and Save" Tab --> and there make sure that the "Automatic save" on the lower left corner is active and preferably set to every 10 minutes or less. To easily change the time of the autosave feature, use the SAVETIME system variable.