Hi All. I want to run a HelloWorldClassic sample. [http://developer.apple.com/iphone/samples/index.action] I can build it well. When I run it in the simulator, the view is OK (with a earth map shown) at the beginning. But 1 or 2 seconds later, the view is empty. Then I check that there is a warning "warning: no '-initWithNibName:bundle' method found" when building the project. Samples with xib file defined view are the same case. Other samples are OK. I don't know whether the xib file is no attached with the UIViewController. I'm a fresh one on Mac. I installed: iPhone SDK 2.0 sdk xCode version 3.1(Beta) IB version 3.1(649) I don't how to fix this problem. Any help is good help.