Unable to cast COM object

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Unable to cast COM object of type 'System.__ComObject' to interface type ' \a. \a'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{39C13A4D-011E-11D0-9675-0020AFD8ADB3}' failed due to the following error: The RPC server is unavailable. (Exception from HRESULT: 0x800706BA).
any one have idea about this exception

Posted 3-May-11 2:17am

vrushali katkade

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Olivier Levrey 3-May-11 8:20am

If you could give some code or details about your COM object, maybe a few people would have ideas.

2 solutions

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E.F. Nijboer · Answer 1 · 2011-05-03T03:39:00

Solution 1

Firewall? Proxy? Set the correct configuration with dcomcnfg.exe?
Check out this link for more information:
http://ezinearticles.com/?How-to-Fix-The-RPC-Server-Is-Unavailable-Easily&id=5048827[^]

Good luck!

Posted 3-May-11 3:39am

E.F. Nijboer

Member 4437599 · Answer 2 · 2016-02-12T05:02:00

My solution was change Solution "Platform" to "x86" from "AnyCPU" on Project and rebuild.

My problem is caused using project born on x86 and ported on x64 architecture
with VisualStudio 2010.I was resolved changing Solution "Platform"
from "AnyCPU" to "x86" on Current "Configuration" on Project to run
pratically:
in Solution Explorer Click-R on Solution (top of panel) -> Configuration Manager
in the grid on row of problematic project in column "Platform" choice "<New...>"
in windows you choose:
Platform: "x86"
Copy setting from: "Any CPU"
deselect "Create new solution" if nedeed
then [Close], [Close] rebuild and Run... now for me it is working
CiaoCiao

Unable to cast COM object

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Unable to cast COM object

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