问题
I am attempting to create a new COM object in my DLL using the ATL Simple Object Wizard in Visual Studio 2005.
I enter the short name for the object, and all of the other fields are derived.
However, when I click Next in the wizard, the following error message comes up:
Object 'IXxxInterfaceName' already exists
I have searched my entire solution for all references to IXxxInterfaceName and can't see it defined anywhere.
How is the wizard determining that it exists already?
回答1:
I never found out why the wizard determined that the object name existed already - I'm guessing something was cached somewhere that I couldn't track down.
In the end, I appended a 2 to the end of the interface name when creating it which allowed it to be added. Then I replaced all the occurrences of IXxxInterfaceName2 with IXxxInterfaceName. Everything worked after this.
If I ever track down the root cause of this problem, I'll update the answer.
回答2:
Is it defined in a library you are referencing?
回答3:
Also happens in VS 2008. However Clean solution and Clean project from build option solves this :-)
来源：https://stackoverflow.com/questions/636975/atl-simple-object-wizard-object-xxx-already-exists-error