Unable to cast COM object of type

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When I try to run the code in debug mode I get following error ..any suggestion how can i take care of it? thanks

Unable to cast COM object of type 'Microsoft.Office.Interop.PowerPoint.ApplicationClass' 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: Interface not registered (Exception from HRESULT: 0x80040155).

Posted 3-Nov-11 20:28pm

EricThe

Updated 3-Nov-11 20:43pm

Prerak Patel

v2

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Prerak Patel · Answer 1 · 2011-11-03T20:46:00

Solution 1

Invalid reference or reference to some unregistered assembly can cause it. Check if you are referencing correct version of Office Interop.

Posted 3-Nov-11 20:46pm

Prerak Patel

koolprasad2003 · Answer 2 · 2011-11-03T20:49:00

Solution 2

which line gives you error can you post it ?

Posted 3-Nov-11 20:49pm

koolprasad2003

Comments

EricThe 4-Nov-11 3:50am

this is the line

ApplicationClass pptApplication = new ApplicationClass();
Presentation pptPresentation = pptApplication.Presentations.Open("bigstory.ppt", MsoTriState.msoFalse,
MsoTriState.msoFalse, MsoTriState.msoFalse);

koolprasad2003 · Answer 3 · 2011-11-04T03:04:00

Solution 3

Use following code, it might help you.

Microsoft.Office.Interop.PowerPoint.Application pptApplication = new Microsoft.Office.Interop.PowerPoint.Application();

Presentation pptPresentation = pptApplication.Presentations.Open("bigstory.ppt", MsoTriState.msoFalse, MsoTriState.msoFalse, MsoTriState.msoFalse);

Posted 4-Nov-11 3:04am

koolprasad2003

Comments

EricThe 4-Nov-11 12:33pm

thanks for the code, that error went away but now this comes up
Retrieving the COM class factory for component with CLSID {91493441-5A91-11CF-8700-00AA0060263B} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).

ARBebopKid · Answer 4 · 2011-11-04T09:39:00

Solution 4

Do a repair on your office installation. I think.

Posted 4-Nov-11 9:39am

ARBebopKid

koolprasad2003 · Answer 5 · 2011-11-04T18:56:00

Solution 5

219044-Retrieving-com-class-factory-component-while-powerpoint-creation-using-c.aspx[^]

Posted 4-Nov-11 18:56pm

koolprasad2003