Comments on: IIS7 Gotcha – COM Error 80040154

By: dotnetworkaholic

dotnetworkaholic — Sat, 17 Sep 2011 11:20:55 +0000

It’s there in Win7; I was playing with a few weeks ago to solve an Oracle ODP.Net issue

By: dev

dev — Fri, 16 Sep 2011 19:46:59 +0000

i’m using windows 7.. and vs2008. I couldn’t find an option to enable 32-bit applications! Do you know any other way around?

By: Garen Hagopian

Garen Hagopian — Fri, 29 Jul 2011 14:20:22 +0000

i just wanted to say thank you sooo much
this issue had me going in circles for two whole days. now it’s fixed.

i kept getting COM component errors which did not help in troubleshooting the problem.

By: Desmond Hume

Desmond Hume — Thu, 28 Apr 2011 13:01:33 +0000

Thanks so much, i tried everything with registry regsvr32 and permissions and stuff. Now it worked, got me into some frustrating days

By: simonwdixon

simonwdixon — Tue, 29 Mar 2011 18:54:44 +0000

Thank you, Thank you, Thank you… I’ve had a very stressful day on this problem.

By: CoryJ

CoryJ — Fri, 14 Jan 2011 17:15:02 +0000

Paul, this information was a lifesaver! I had a COM DLL working great from a desktop app I was using to test, but my asp.net app completely refused to load it, offering instead its 80040154 apologies. I’ve been wrestling with this for a day and a half before stumbling onto this blog and solving my problem in about 3 minutes.

Thank You!

By: How do I allow accessing COM components through IIS service?

How do I allow accessing COM components through IIS service? — Sun, 21 Nov 2010 19:27:37 +0000

[...] j0rd4n I found the solution. Many forum posts suggested it was a permissions issue. However, this link revealed it was an AppPool issue. It turns out, you have to configure the application pool to allow [...]

By: Jonathan

Jonathan — Wed, 03 Nov 2010 13:22:28 +0000

Thanks so much, this is an invaluable piece of knowledge.

By: Bill

Bill — Fri, 29 Oct 2010 20:31:54 +0000

This was a bear. Totally threw me this AM. I KNEW the vb comm interop I was given to use was registered because it would work when testing in Cassini. I only started getting this wierd error when I tried testing in IIS7 on the same workstation. I figured it was a permission problem, and didn’t even consider the bit issue. Thanks for the solution, you saved me a lot of time trying to figure this out.

By: grant7bar7

grant7bar7 — Fri, 16 Jul 2010 05:20:24 +0000

I can’t tell you how much time I put in to trying to resolve this to no avail. Everything worked fine in the ASP.NET Visual Web Developer 2010 Web Development Server, Cassini, but I got the Com Component not registered error when publishing to IIS 7 on my remote Windows 2008 x64 box. THANK YOU!!!!!