I'm porting my iphone app to ipad, and therefore created a completely new project. After programming a while, i wanted to import the coredata model from my iphone project, so i can have the same coredata storage layout. but for some reason, xcode 4.2 wont let me use the imported model. after drag-and-dropping the versioned model (foobar.xcdatamodeld) into my ipad project (copying it to the destination), i am unable to select the current version, and the model will not show the arrow-indicator as well as no sub-models in the file-list on the left side of xcode. even if i create a new datamodel (file -> new...), i get the same behaviour. i can't edit the model, because appearently it is not opened (clicking on the model in the file list will not change the editor window in the middle), i cannot add a version to the model (the menu item unter "editor" is not present), and i can't select any current version.
i noticed that the object inspector will state a path that is "Relative to group", with the path beeing "../foobar.xcdatamodeld" (which is "foobar.xcdatamodeld" in my iphone project), and the full path is beeing blank.
i even edited the model and xcode project files through vi, to make it look like the iphone ones, with no success.
so, right now i can't neither add a new datamodel, nor import the existing model.
can anyone help?