I need the button that will change the content (list) of a ListBox. When I create such Maplet, ListBox behaves very strange! The ListBox sometimes shows the list after the button click, but sometimes the list disappears. 

The code below reproduces this strange behavior. Just click the button several times.

with(Maplets[Elements]):

getObjects := proc()
local testList;
use Maplets:-Tools in
testList := ["YAHOO", "YAHOO", "YAHOO", "YAHOO", "YAHOO", "YAHOO"];...

How to run a command using Maple Command-Line on Ubuntu.

When I run the following command through terminal:

/home/myuser/maple14/bin/maple -c 2+2

Maple runs as expected, but the command (2+2) is not calculated.

How can I solve this?