Win7 system Protel can not add library files how to do

            1. First introduce the Protel99 library file to add this small software;
2, first open Protel, and create four files as shown in the figure;
3, open Schlib1.Lib, just draw a device. Then save and close;
4, then open Sheet1.Sch for circuit diagram drawing. Add the device library just drawn in the right Libraries, click Add/Remove;
5. Pop up the dialog box and select the path of the created ddb file. Click Add, an error will occur, and the library file cannot be added;
6. Click OK on the pop-up error window to keep the Change Library File List dialog box. Then open the Protel99 library file to add small software. Since the circuit library file is to be added, check SCH, then click Add Library, find MyDesign.ddb, and then click Add to Protel;
7. Go back to the Change Library File List dialog box and you can see that the library file has been Add;
8, click OK, return to the circuit diagram panel, see a library file in the Libraries file library;
9, the same, when adding the PCB library file, in the Protel99 library file add software The library category selects the PCB. When you need to pay attention, you must first close the Protel99SE software when adding PCB library files. Then press the “Add Library” and “Delete” button.