If an error occurs while an operation is running in background, the message related to the error appears at the cursor position with the following addendum.
Error while Running filePro in Background.
The message is also "mailed" to you for later reference (see "mail" command in your operating system manual). You don't have to break out of the program but you may want to refresh your screen by pressing the <REDRAW> key (usually <CTRL> <L>). Refer to the Terminal Guide or termcap definition for the applicable key.