Make sure that the project and the modules that are included in the partition definition are not open. If either the project or any of the modules are open, you cannot export the partition definition.
A project is open if the open project icon

is displayed in the database explorer, or if a project, folder, or module inside the project is open. If a project, folder, or module is open, the parent folder or project is also open, and so are all the folders and projects above it in the database tree.
Note: If a module in the partition contains an attribute that is assigned a URI, the attribute is exported, but the URI is not. Any actions that depend on the URI cannot be carried out in the receiving database.