The system sometimes sends error messages that require you to respond or select from a group of options. Based on the possible choices given (always in parentheses), this is generally a one-character response.
Verify alignment on device PRT01. (I C G N R)
Messages of this kind with possible choices most often appear on the system operator message queue. However, under certain circumstances, they can also appear on your own message queue.
You aren't expected to know or remember the meanings of the numbers or letters in any reply. The Additional Message Information display provides information about each choice. In addition, this display also provides a reply line on which you can type your reply (if a reply is needed).
Suppose that you want to print a finished report. You send it to the printer, but it doesn't print. You check your message queue and find the following message:
End of forms on printer PRT01. (C H I PAGE 1-99999)
The computer wants you to reply, using one of the four choices that are shown (C H I PAGE 1-99999).