1. Generating Drill Files To create a Gerber file in Eagle, you should run the drillcfg command first: File -->Run ULP -->  the pop-up "Drill Configuration" dialog box and click the "OK" button to generate the corresponding drill configuration file. 2. Generating Gerber Files Open the .brd file, and then  the "File" menu to open the "CAM Processor" dialog box. In the "CAM Processor" dialog box, select "File" -> "Open" -> "Job ..." command, open the "Open CAM Job" dialog box, select the "excellentone.cam" and click "Open" button. After loading it, click the "Process Job" command to generate the corresponding drill file: In the "CAM Processor" dialog box, select "File" -> "Open" -> "Job ..." command, open the "Open CAM Job" dialog box, select one of the "gerb274x.c