Click issue - 'NoneType' object has no attribute 'getCenter'

[AstroMen]

I try to click image using Sikuli, but it raises an error: ['NoneType' object has no attribute 'getCenter'].

Code as below: from sikuli import Sikuli, Pattern

skl = Sikuli() pattern = Pattern(imagepath) x = 1, y = 2 pattern.targetOffset(x, y) skl.click(pattern, timeout=20*1000) # raise Attribute Error

Traceback (most recent call last): File "...", line , in ClickImage skl.click(pattern, timeout=20*1000) File "...\Python27\lib\site-packages\sikuli-0.2-py2.7.egg\sikuli\sikuli.py", line 88, in click loc = Pattern(target_string).similar(self.similarity).getLocation() File "...\Python27\lib\site-packages\sikuli-0.2-py2.7.egg\sikuli\sikuli.py", line 167, in getLocation loc = region.getCenter()

Could you give any suggestion? Thanks a lot.