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unable to call add/update bapis thru webservices in web as 6.20

I am able to call out of the box as well as custom bapis as a webservice for getting data. But it is giving me an error when I try to add a web reference for any bapi for creating/updating objects. I tried with several bapis (custom as well as out of the box)

I am able to browse the url and view its wsdl , but when i add the web reference in .net it is giving me the following error:

<b>Unable to cast COM object of type 'System.__ComObject' to interface type 'EnvDTE.IVsExtensibility'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{3C536122-57B1-46DE-AB34-ACC524140093}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).</b>

Can anybody help me....

Former Member
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