The Maple interface connects to the kernel over a localhost connection. Normally, there is no problem. However, sometimes it is necessary to specify how Maple makes this connection.
Open a file manager, such as Windows Explorer or File Explorer (or Finder on Macintosh, or Files on Linux).
Locate the Maple initialization file. It is usually found here:
C:\Users\%USERNAME%\AppData\Roaming\Maple\2019\Maple.ini (Windows) //Users/$USER/Library/Preferences/Maple/2019/Maple preferences (Macintosh) //home/$USER/.maple/2019/maplerc (Linux)
Open the file with the text editor of your choice. Just in case, you may want to run the program with administrative privileges.
Directly below the line starting "[Options]", add the following:
Save the file and test Maple.
If the problem still occurs, try "=1" instead of "=0". If this doesn't work, try "=2". If the problem still occurs, please contact firstname.lastname@example.org.
Note: If you don't have a "Maple.ini" (or similar preferences file, which is generated the first time Maple starts), you can create one yourself, with the same path and name as above, having the following content: