Unable to cast COM object of type 'Microsoft.Office.Interop.PowerPoint.Application'

Question

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I am creating power point application using vs2010 c# with asp.net.

I am Using windows server 2008 R2 enterprise edition and Microsoft office professional plus 2007, vs2010.

I tried in XP sp2 with IIS 5.1, Microsoft office professional plus 2007 and vs2010 its working fine.

It was working fine with out using IIS.

If I connect to the IIS I am getting the below error

Error:
Server Error in '/LOUPeProject.WebDummy' Application.

Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Interop.PowerPoint.Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{91493442-5A91-11CF-8700-00AA0060263B}' failed due to the following error: Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)).

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidCastException: Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Interop.PowerPoint.Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{91493442-5A91-11CF-8700-00AA0060263B}' failed due to the following error: Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)).
Source Error:
Line 2347: }
Line 2348:
Line 2349: Microsoft.Office.Interop.PowerPoint.Application pptApplication = new Microsoft.Office.Interop.PowerPoint.Application();
Line 2350:
Line 2351: Microsoft.Office.Interop.PowerPoint.Slides slides;

Kindly help me out this issue. What might be the Library not registered.

Posted 15-Dec-13 16:14pm

D-Kishore

Updated 23-Dec-13 15:23pm

v13

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Comments

LaxmikantYadav 15-Dec-13 23:58pm

Invalid reference to some unregistered assembly can cause it.

D-Kishore 16-Dec-13 1:05am

but its working fine with without iis

Mehdi Gholam 16-Dec-13 1:58am

Make sure Office is installed on the IIS machine.

D-Kishore 16-Dec-13 2:15am

yes vs2010,iis and office all 3 installed on the same machine

Aravindba 19-Dec-13 22:30pm

hai r u trying to run power point form web ? if any exe u trying run form iis ,u need permission.

D-Kishore 20-Dec-13 0:45am

Yes i am running from the web only where I need to give permission.Please help me

creepz03 19-Dec-13 22:42pm

It could be a problem with application pool permission.

D-Kishore 20-Dec-13 0:46am

Here I am using XP sp2 and iis 5.1, where I need to give permission

Aravindba 20-Dec-13 2:25am

r u try to open power point in website ? if it is local drive it work,but if u move to iis it not work ?

D-Kishore 20-Dec-13 2:36am

With out IIS its working, when i connected to the IIS i am getting this error?

Aravindba 23-Dec-13 0:29am

yes ,without iis it work,bcz server and client are same machine,r u try to open power point exe in ur web site ?.

D-Kishore 23-Dec-13 1:48am

But its working XP sp2 with IIS 5.1 and microsoft office professional plus 2007

2 solutions

Solution 1

You should check whether PowerPoint is installed in the IIS system or not. If installed, you can do the operations, else you can't.

Follow my Tip - How to Check Whether PowerPoint is Installed in the System or Not[^] for that.

Posted 15-Dec-13 20:08pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

D-Kishore 16-Dec-13 2:16am

Yes its installed.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 16-Dec-13 2:30am

Try the solutions given in below links.

1. C#: PPT to PDF-Unable to Cast COM Object of Type 'Microsoft.Office.Interop.PowerPoint. ApplicationClass' to Interface Type 'Microsoft.Office.Interop.PowerPoint. _Application[^]

2. Unable to cast COM object of type 'Microsoft.Office.Interop.[^]


Hi,
 
Imtiyaz Ansari, i got solutoin for this problem.

I just delete the Key from the Registry Editor and it's working now.

The Procedure is:

Start--> Run --> regedit 

&

HKEY_CLASSES_ROOT-->TypeLib-->{00020813-0000-0000-C000-000000000046}
 --> 1.8(Delete one)
I Delete that 1.8 Key.
Now it's working fine.

Here try to use the id in your exception - 91493442-5A91-11CF-8700-00AA0060263B

D-Kishore 16-Dec-13 3:11am

Yes i searched with this key, key was found but i am unable to see like 1.8.
Here i can see folders like InprocHandler, InprocHandler32,localserver,localserver32, progid,versionindependentprogid.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 16-Dec-13 3:26am

Inside TypeLib try to find the Key. Then under Key there must be a number not 1.8. It will differ in your system.

D-Kishore 16-Dec-13 4:27am

Hi Tadit,

When I search this key {91493442-5A91-11CF-8700-00AA0060263B} inside the HKEY_CLASSES_ROOT-->TypeLib

the key found at HKEY_CLASSES_ROOT\Woe6432Node\Interface\{{91493442-5A91-11CF-8700-00AA0060263B}}

Inside this 3 folders

ProxyStubClsid-inside this
default key:{00020424-0000-0000-C000-000000000046}

ProxyStubClsid32-inside this
default key:{00020424-0000-0000-C000-000000000046}

TypeLib-inside this
default key:{91493440-5A91-11CF-8700-00AA0060263B}
Version:2.9

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 16-Dec-13 5:37am

No, I am not sure now. Try re-installing office in the system. If problem is still there, then contact Microsoft Support team.

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D-Kishore · Accepted Answer · 2013-12-23T23:14:00

Solution 2

Here we need to some settings in iis Current project application pool

In IIS Current Applicationpool-advanced settings- enable 32 bit application set it to True.

Everything works fine now.

Posted 23-Dec-13 23:14pm

D-Kishore