"While not" loop failing

the .py, you are running and that produces the error FindFailed is not the script, you mention in the beginning (1270768938536.png fails and that is not mentioned in the .py).

But thats not the problem:

With version 0.9.9, by default, a find not found throws exception FindFailed and ends the script. So your script will never do what you want: wait until "your whatever" appears and then shoot :-((

how to:
setThrowException(False) # we want to go on after find failed
while True: # would run forever, if target never comes up ! (try shift-cmd-c to kill it)
   if wait("image you are waiting for", 5000) # 5 seconds max, then returns None
      break
setThrowException(True)
# now you can shoot

If you want it limited:
setThrowException(False)
gotYou = False
for i in range(10): # would anyway stop after about 1 minute
   if wait("image you are waiting for", 5000)
      gotYou = True
      break
setThrowException(True)
if not gotYou:
   popup("No success, sorry")
   raise "No success, sorry" # to stop the drama here
# now you can shoot

I'm a snow leo too ;-) - have fun!

Thank you for the reply. I want the script to want indefinitely, so i tried the first code you posted. If i understood correctly, I should make my code like this:

setThrowException(False)
while True:
    if wait( , 5000):
      break
setThrowException(True)
switchApp("Firefox.app")
click( )
sleep(2)
find( )
click( )

But when it completes the whole procedure it does not loop to the beginning, it just stops.

ok, so if this is your workflow that should be repeated for ever, you have to add an outer loop.

while True:
  setThrowException(False)
  while True:
    if wait( , 5000):
      break
  setThrowException(True)
  switchApp("Firefox.app")
  click( )
  sleep(2)
  find( )
  click( )

or again a limited version:

for i in range(aNumber): # instead of the first while True:

I think this bug is still in 0.10.1!

I was just testing Sikuli out so I made this:
while not find( ):
     sleep(1)
popup("I found Messenger!")

Indeed, it fails to run indefinitely. So, what's the proper way to make it loop forever—unless Messenger is found of course?

With 0.10.1 the right way to do things like this is:

while not exists(image, 0):
    wait(1)
popup()

You may look at the "Complete guide to Sikuli" for more information:
- exists() does not stop the script with a FindFailed
- with the ... ,0 you tell exists() to only look once (standard is some tries within 3 seconds)
- so with wait(time) you can control the timing

an alternative may be to check out the new observer feature.