# Package org.jbpm.services.task.exception

- Exception Summary
  Exception | Description
  --- | ---
  CannotAddTaskException | Exception thrown from the `TaskServiceSession` when there is a problem adding task.
  IncorrectParametersException | Exception that is thrown when the parameters to a query are incorrect, with regard to either the number or type.
  PermissionDeniedException | Exception that is thrown when a `User` try to perform an `Operation` on a `Task`
  TaskExecutionException |