An internal error has ocurred when I try to create new DC

Hi everyone,

When I try to create a new Web Dynpro DC, its will return "An internal error has occurred.See error log for more details". No matter whatever name I give still same.

Message: Resource /JDI.....com alredy exists.

Exception: org.eclipse.core.internal.resource.ResourceException: Resource /JDI.....com already exists.

p/s: I have checked in DTR and the DC are not exists.

Kindly please help.

Thanks.