Delphi / Object Pascal · Exception
What does EClassNotFound Exception mean in Delphi / Object Pascal?
A descendant of EFilerError raised when a DFM/stream references a component class that isn't registered or linked into the application - commonly a form using a third-party or custom component whose unit was removed from the uses clause, or a package that wasn't loaded.
A descendant of EFilerError raised when a DFM/stream references a component class that isn't registered or linked into the application - commonly a form using a third-party or custom component whose unit was removed from the uses clause, or a package that wasn't loaded.
Make sure every component class referenced in the DFM has its unit in the project's uses clause, or is registered via RegisterClass at runtime for dynamically-loaded forms, and confirm any required design-time/runtime packages are actually deployed.