Although you cannot upload anything to "/play/pbm/includes/", here is what you can do instead:
Go to your personal information page or to a page you have created, and use the File Manager to upload your include file. Make sure it is a text file with the .txt extension. In the include statement, include the path in the file name. Here's an example I tried for testing purposes:
include "/membergraphics/who/FergusDuniho/capablanca.txt";
list;
You can tell from the URL that I uploaded this to my personal information page. The list command displayed a listing of the program, which included the contents of the include file. This confirmed that it worked.
Although you cannot upload anything to "/play/pbm/includes/", here is what you can do instead:
Go to your personal information page or to a page you have created, and use the File Manager to upload your include file. Make sure it is a text file with the .txt extension. In the include statement, include the path in the file name. Here's an example I tried for testing purposes:
You can tell from the URL that I uploaded this to my personal information page. The list command displayed a listing of the program, which included the contents of the include file. This confirmed that it worked.