MS Project 2008 File Format is not Valid

I am in trouble. I have a project plan that I spent weeks working on that will not open.

Here are the errors I am getting

The file format is not valid. The file is a project file Project Plan Objectives 2008.mpp is the name of the file

The other error I get is

Project cannot recognize the file format. Do you want to open this file as text only?

Operating System Running Windows Vista Business Edition

Here is what I have done so far.

- Restored the file to previous version.

I have looked at my machine to see if a service pack killed this file.

Restored my system to earlier date than file created.

Installed Project on Windows XP Pro to see if it was an Vista Issue. Same Errors.

At this point all I want to do is get the file open so I can print and see the project layout. Please help

Answered! View the answer I have this problem too

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Chosen Solution

Alternative method (this does not apply for Project 2007 and later versions) only for MS Project 2003...

Save the file in the Microsoft Project Database format:

1. Open your problem file (it may help to turn off automatic calculation if the file is reluctant to open).

2. Select File/Save As...

3. Save as type: Project Database (*.mpd) then click Save.

4. Close the file.

5. Re-open it from the .mpd file.

6. Select File/Save As... And save it as an .mpp file again.

Look at helpful resources which contain different guides, solutions...

https://social.msdn.microsoft.com/Forums...

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