olution:
Open Microsoft project and go to options on Tools menu. Click on options and then click the Security Tab abd then click Macro setting .on options ,Legacy format ,select “Allow loading files with legacy or not default file formats.
To do this, follow these steps:
1.Click Start, click Run, type regedit, and then click OK.
2.Click the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\MS Project\Security
3.Double-click the LegacyFiles registry entry.
Note By default, this registry entry is not created until you change the setting on theSecurity tab in the Options dialog box. Otherwise, this registry entry is not created until you manually create this DWORD value.
4.Type one of the following values, and then click OK:
0
This is the default value if the LegacyFiles registry entry does not exist. This value corresponds to the Do not load file with legacy or non default file formats in Project option in Project 2003.
1
This value corresponds to the Prompt when loading files with legacy or non default file format option in Project 2003.
2
This value corresponds to the Allow loading files with legacy or non default file formats option in Project 2003. This option is the default option in versions of Project 2003 that are earlier than Project 2003 SP3.
5.Exit Registry Editor.
