You can check the validity of your project at any time by pressing F4, selecting Tools > Check Project, or right-clicking the diagram background, and selecting Check Project.
For information about using the Check Project Parameters dialog, see Checking Models.
Model and File Checks
PowerDesigner provides default model checks to verify the validity of models and files.
Framework Node and Cell Checks
PowerDesigner provides default model checks to verify the validity of framework diagram nodes and matrix cells.