How to stop sikuli instances running in background?

Is it possible, to display any debug information, while the script is running?

In the following url, we can learn about the options.

http://sikulix-2014.readthedocs.org/en/latest/faq/010-command-line.html

thank you for the help, but this is not a solution for my primary question / problem

If you are satisfied with a following simple specification, It is possible to achieve by addHotkey().

example 1:
Push Ctrl + F1
When Sikuli-ide is still running, it displays "Still runing".
When Sikuli is finished, it displays nothing.

Script for example 1:
def DisplayStatus(event):
    popup("Still running!", "Workflow Status")

Env.addHotkey(Key.F1, KEY_CTRL, DisplayStatus)

example 2:
Push Ctrl + F2
When Sikuli-ide is still running, it stops Sikuli-ide.

Script for example 2:
import sys
def StopSikuli(event):
    sys.exit()

Env.addHotkey(Key.F2, KEY_CTRL, StopSikuli)

If I understand right:
You are looking for some "I am alive" information, while a SikuliX workflow just waits for an image to appear, which in turn might take a long time.

please confirm.

Generally I recommend, to use the latest SikuliX: http://sikulix.com

Hello Masuo,
very helpful - thanks a lot!

Hello RaiMan,
confirmed

ok, then there is no easy way in the moment.

With 1.1.0:
if you turn on Debugging with level 3, then SikuliX spits out Debug messages with every search attempt during such a wait.
These could be seen in the command line window, when running from command line.

Generally: if you run your script from command line, the command prompt should tell you, wether it is running or not.