Error: sorry we're having trouble starting outlook. only one version of outlook can run at a time.

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Hi friends,

In My Application, I am loading Outlook Contacts to my generic list on startup, and I have more than 2000 contacts in my list (It takes atleast 4 minutes to load all the contacts).
The problem is, When the user try to open the Outlook Application, while these contact fetching is going on... It shows this Error....

"sorry we're having trouble starting outlook. only one version of outlook can run at a time. Check to see if another version of outlook is running, or try restarting your computer"

How to get rid of it... Please Tell me Urgent. This is my code fetching the contacts...

C#

Outlook.Application app = new Outlook.Application();
                     Outlook.NameSpace ns = app.GetNamespace("MAPI");
                     Outlook.MAPIFolder contacts =
                     ns.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderContacts);

                     for (int i = 1; i < contacts.Items.Count + 1; i++)
                     {
                         //Adding COntacts to a Generic List
                     }

Posted 31-Jul-13 1:22am

Yesudasan Moses

Updated 1-Sep-16 5:56am

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[no name] 31-Jul-13 7:31am

Nope.... I checked. It's not urgent at all. Get rid of what? The error message? Outlook? The user? The running instance of Outlook? Why are you not checking for a running instance of Outlook?

Yesudasan Moses 31-Jul-13 7:37am

I meant, When the user opens the original Outlook APplication for sending mails,,, It wont start,,, It will show the error.. I think only one instance is permitted for Outlook... But I have to fetch contact though,,, May be it will take minutes depending on the count of contacts..
Any alternative methode for fetching contacts without hurting the user's needs ??

Richard MacCutchan 31-Jul-13 8:05am

Tell the user to wait until your application has finished loading; you have no other choice.

2 solutions

Solution 2

Try to get existing instance of MS Outlook before you create new one.

How to: Get and Log On to an Instance of Outlook[^]

Posted 31-Jul-13 3:02am

Maciej Los

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ZurdoDev · Accepted Answer · 2013-07-31T02:04:00

Solution 1

Perhaps you can use Exchange Web Services (EWS) instead of using the Outlook client because the only way to get around your issue is for the user to wait. The error is clear about that.

There is an example here:
http://chrisrisner.com/Programmatically-Accessing-Outlook-Contacts-Via-Exchange-Web-Services[^]

Posted 31-Jul-13 2:04am

ZurdoDev

Updated 31-Jul-13 2:17am

v2

Comments

Maciej Los 31-Jul-13 9:03am

Good suggestion.
+5!
See mine ;)

ZurdoDev 31-Jul-13 9:07am

That is good. I think in this case his code is already running and then the user is kicking off Outlook but since his code was already running they get the error.