In this time, we negotiate the solutions to an Outlook error which happens when you want to access a PST file with Outlook 2002 or earlier versions. But the data file is created by Outlook 2003 or higher versions. The error message is ".pst is not compatible".

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Ways to resolve the Outlook
error “.pst is not compatible”

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 On one occasion, my computer crashed
inexplicably.
 In order to keep my usual work in Outlook, I
copied my Outlook data file to another
computer.
 But when I tried to access my PST file, the
Outlook threw out a error mentions “.pst is
not compatible”.
 After some research, I found that
the question was probably owing to the
Outlook version.

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 My data file is created in previous laptop by
Outlook 2010, and the latter computer only
has Outlook 2002.
 After some hard work, I find solutions to
this problem eventually.
 And here, I’d like to share with you.

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Fix the Error within Outlook
 The first method is converting all the data
to an Outlook 97-2002 data file.
 Here I will use Outlook 2010 as an example
and all the steps are as below.
1. At first, launch Outlook 2010.
2. Then go to “File” menu and click “Account
Settings” under “Info” tab.

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3. Next in the latter “Account Settings” window,
head to “Data File” tab. And click the “Add”
button.

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4. In the new popup interface, set the file
name. And in “Save as type” field, choose
“Outlook 97 – 2002 Data File” from the
drop down list.
5. Then click “Yes” to create a new PST file.
And click “Close” to back to Outlook
navigation pane.

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6. At the navigation pane, locate the new PST
file. Then drag and drop all the data from
original PST file to the new one. Besides,
you can also use Outlook Import and
Export Wizard to convert the data.
7. At last, you can just access this new PST
file by an old Outlook version.
 Conclusion:
This method is totally free but has much
repeated actions, which may waste a lot of
time.

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Suggest an Third Party Tool
 If you require a more effective way, then a handy
tool called DataNumen Outlook Repair may be
the perfect choice.
 Let’s see how it works.
① Install and launch the tool.
② Next in the home window, select the source file
and choose its format as “Outlook 2003 – 2013”.
③ Then name the new file and set its format as
“Outlook 97 – 2002”.
④ Finally, click the “Start Repair” button.

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 After the process, you can just get the
wanted file.
 Conclusion:
This method is fast and labor-saving but
you have to purchase first.

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Thank you !!!!