The last error part represents the last error that took place in a multimedia part.
This part allows you to add error handling to your applications without having to write your own messages for errors that might occur through use of the multimedia parts. For example, the error text for a MMPM error is automatically filled in.
To access the last error's public interface, you must first add a part that has this attribute to your application such as the digital video player. Then, you tear off the lastError attribute from that part.