If an error occurs during deletion, you will be notified by an Exception dialog.
Deleting a file from a Package File can be slow or fast depending on the type of file that is open, the size of that file and the speed of your system. It is strongly recommended that if you need to delete more than one file that you turn on Multi-select mode, select the files you want to delete and then use the delete command instead of using the delete command for each individual file.