What might be the reasons for Add-In Failure?

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What might be the reasons for Add-In Failure?
Common reasons behind Add-In Failure in Outlook? 
pranava




Posts: 61
 Joined: 2009-03-12
Hi All,
Can anyone please tell me why an Add-In fails? It will be installed nut will not display in the Outlook. When we go to the COM Add-Ins list, it will show an error like "Not Loaded. Error occurred while adding COM Add-In".

I have developed one add-in for outlook 2003. It installed and worked fine. But, suddenly one day they have disappeared. The plug-ins are not displaying even I reinstall them.

This is happening in 2 out of 10 systems only. Remaining are working fine. What might be the reason for this abnormal behavior?

It is known that this problem is faced by most of the VSTO programmers.

Please describe the above and suggest possible remedies for the problems.


Thanks,
Pranav

Regards,
Pranav Ainavolu
Posted 28 Apr, 2009 07:10:17 Top
Andrei Smolin


Add-in Express team


Posts: 19138
 Joined: 2006-05-11
Hello Pranav,

You can try adding some debug messages that would allow determining the stage at which the add-in fires an exception; and move initialization of all class-level variables to an appropriate event.
Check if security settings for your assembly are correct on thoses PCs.
Create an empty VSTO add-in and install it on those PCs. Does it register OK?


Andrei Smolin
Add-in Express Team Leader
Posted 28 Apr, 2009 08:47:43 Top
pranava




Posts: 61
 Joined: 2009-03-12
Hello Andrei,
Thankyou for the quick response and sorry for my late reply.

I have one more doubt! My Outlook 2007 AddIn, which is working fine in XP is not working in Vista 64-bit OS.
Are there any special precautions that are needed to be followed while developing Add-In for 64-bit systems? Please educate me.


Thanks,
Pranav

Regards,
Pranav Ainavolu
Posted 05 May, 2009 02:52:43 Top
Andrei Smolin


Add-in Express team


Posts: 19138
 Joined: 2006-05-11
Hello Pranav,

There are no differences when developing add-ins for 64-bit systems. Note that Office as well as add-ins are 32-bit.


Andrei Smolin
Add-in Express Team Leader
Posted 05 May, 2009 09:53:44 Top
pranava




Posts: 61
 Joined: 2009-03-12
Thankyou Andrei!
Regards,
Pranav Ainavolu
Posted 05 May, 2009 10:47:27 Top