Abstract: In the case where the paper size and paper type other than that stored in the tray of the printer is specified by the printing job data, through registration to the alternative table an alternative printing is performed on the papers stored in a predetermined tray. Even in the case where there is no paper of a specified size and type the next time on, the printer does not become in the paper disagreement error condition, and the printing processing is executed. Thus, it is not necessary to change the setting of the tray or depress the CONTINUE switch in each printing job data, and the printing processing is continued. Therefore, operability in users is enhanced.

Abstract: In the case where the paper size and paper type other than that stored in the tray of the printer is specified by the printing job data, through registration to the alternative table an alternative printing is performed on the papers stored in a predetermined tray. Even in the case where there is no paper of a specified size and type the next time on, the printer does not become in the paper disagreement error condition, and the printing processing is executed. Thus, it is not necessary to change the setting of the tray or depress the CONTINUE switch in each printing job data, and the printing processing is continued. Therefore, operability in users is enhanced.