Usually that happens if the addin is not fully trusted on the target
machine, something that's required and usually requires a custom installer
action.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"Peter Hegelund" wrote in message
...
I have the same problem so let me describe it in a little more detail.

Two systems have the the Outlook Add-in installed.

One PC works fine, the other fails to load the Add-in with this text
"Load error. A runtime error occurred during loading of the COM Add-in"

Where may I find more information about the runtime error?

The systems have similar SW baselines

XP Pro SP2
.NET 2.0
Outlook 2003 SP2
VSTO 2005 runtime
Office 2003 PIA's

Another post suggested that I disabled CAS but this doesn't help.

Registry looks fine excpet of course the Add-in's Loadbehaviour is changed
from 3 to 2.

I do not have vish's problem locating the Add-in thru Advanced options|COM
Add-ins
but it is unchecked.

Regards
Peter
--
C - C++ - C# (sigh of relief)


"vish" wrote:

I have developed the add-in using Visual studio 2005 in C#.


Outlook add-in is failing to load when Outlook starts on some machines.

It works absolutely fine on some other machine. On problematic
machines, some times the LoadBehavior is changing from 3 to 2 when
oulook starts. I can't even find my Addin either in the Disabled list
(Help_About) or Tools-Options-Others-AdvancedOptions.