System.Exception: Cannot create ActiveX component

Posted on 2011-02-13
Medium Priority
Last Modified: 2013-11-25
Running .IIS 7.0 Windows 2008 R2
Error on this line oexcel = CreateObject("Excel.Application")

When running the application on the server.  Does this mean I need Excel 2010 installed on the server?
Question by:IandINSW
LVL 52

Expert Comment

by:Carl Tawn
ID: 34888843
If that is server-side code then yes. It may also be a problem with permissions for the account running your code. But if you don't have Excel installed on the server then that is your first step.
LVL 17

Accepted Solution

Jesse Houwing earned 500 total points
ID: 34889821
See: http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/b401459a-d14a-4517-b204-fe7c0f5b1f83/

n important reminder:

Office COM automation in a server environment is fully-*un*-supported.

Please read the following document on reasons why and alternatives:


Also note that is you decide to run office on the server, you'll need to ensure your licenses are in order. You might need a Office licenses for every user that might cause the office automation to run, which can be very costly if your application is available through the internet or to 3rd parties.

Next to the Microsoft provided alternatives, there are a number of 3rd party components that allow office automation tasks and usually stay pretty close to the Word API to make conversion of your code relatively easy. I've worked with Aspose components for this purpose in the past and can recommend them (http://www.aspose.com/categories/.net-components/aspose.words-for-.net/default.aspx).

The same applies to Excel, Aspose.Cells or Excel Package Plus (http://epplus.codeplex.com/) are components I've worked with in the past and I can recommend them.

Sharepoint now offers Excel and Word automation services that dont require Office to be installed on the server. See:

Featured Post

Train for your Pen Testing Engineer Certification

Enroll today in this bundle of courses to gain experience in the logistics of pen testing, Linux fundamentals, vulnerability assessments, detecting live systems, and more! This series, valued at $3,000, is free for Premium members, Team Accounts, and Qualified Experts.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

If you haven’t already, I encourage you to read the first article (http://www.experts-exchange.com/articles/18680/An-Introduction-to-R-Programming-and-R-Studio.html) in my series to gain a basic foundation of R and R Studio.  You will also find the …
Q&A with Course Creator, Mark Lassoff, on the importance of HTML5 in the career of a modern-day developer.
The viewer will learn how to use the return statement in functions in C++. The video will also teach the user how to pass data to a function and have the function return data back for further processing.
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

627 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question