[2.0.4] getting java.lang unknown exception when running any click() from IDE

start the ice fromm command line

java -jar <path-to>\sikuliide...jar - v -c

and run a
click(someShot)

The debug output should tell more.

I guess, it is because the OpenCV libs cannot be loaded.

On your system a suitable Vision C++ Redistributable might be missing.
see: https://support.microsoft.com/de-de/help/2977003/the-latest-supported-visual-c-downloads

(I am sorry, but I do not test on Win7 anymore)

So I tried a 2 lines script by following your comments:

popup("Test")
click("1596158311940.png")

and received the debug information as below:

[debug] Jython: added as Jython::sys.path[0]:
C:\Users\xiaoli\AddData\Roaming\Sikulix\Lib\site-packages
[debug] Jython: ***** sys.path
 0: Y:\Desktop\test.sikuli
 1: C:\Users\xiaoli\AppData\Roaming\Sikulix\Lib\site-packages
 2: C:\Users\xiaoli\AppData\Roaming\Sikulix\Lib\
 3: C:\Users\xiaoli\AppData\Roaming\Sikulix\Extensions\Lib
 4: C:\Users\xiaoli\AppData\Roaming\Sikulix\Extensions\jython-standalone-2.7.1.jar\Lib
[11561 debug] JythonRunner: ready: version 2.7.1
[debug] Jython: SikulixForJython: init: starting
[debug] Jython: added as Jython::sys.path[0]: C:\Users\xiaoli\AppData\Roaming\Sikulix\Lib\site-packages
[debug] Jython: SikulixForJython: init: success
[debug] Jython: sikuli: Sikuli: starting init
[debug] Jython: use as default region: R[0, 0 1680x1050]@S(0)
[debug] Image: BufferedImage: (1680, 1050)
[debug] Jython: sikuli: Sikuli: ending init
[debug] Jython: use as default region: R[0, 0 1680x1050]@S(0)
[debug] Image: BufferedImage: (1680, 1050)
[debug] Image: reused: 1596158311940.png (file:Y:\Desktop\test.sikuli\1596158311940.png )
[debug] Region: wait: waiting 3.0 secs for 1596158311940.png tp appear in R[0, 0 1680x1050]@S(0)
[debug] RunTime:loadlib: trying opencv_java342
[debug] RunTime:addToWindowsSystemPath: added to systempath: C:\Users\xiaoli\AppData\Roaming\Sikulix\SikulixLibs
[debug] RunTime:checkJavaUsrPath: added to ClassLoader.usrPaths
[debug] RunTime:libsExport: folder exists: C:\Users\xiaoli\AppData\Roaming\Sikulix\SikulixLibs (2.0.4 - 202003140801)
[debug] RunTime:loadLib: opencv_java342.dll (success)
[debug] Finder2: makeMat: INT_RGB (1680x1050)
[debug] Finder2: makeMat: 3BYTE_BGR (45x35)
[debug] Finder2: doFindImage: start (stdDev: 168.9986 mean: 509.013968)
[error] script [ test ] stopped with error in line 2
[error] java.lang.Exception ( java.lang.Exception: unknown exception )
[error] --- Traceback --- error source first
line: module ( function ) statement 2: main ( <module> ) click("1596158311940.png")
[error] --- Traceback --- end ---------------
[debug] RunTime:***** running cleanUp *****

Looks like the OpenCV libs loaded successfully on my PC but still didn't get anything helpful?

Also I have already Visual C++ 2008-2015 Redistributable installed. Should I still try the newer version (say 2017 - 2019)?

Yeah... I think you are right. Some libraries might be probably missing with the OS (kind of simplified ) on my PC. Unfortunately there's no internet access when I work in the office which means getting the solution would take too much effort so I decided to give it up and turn to use the version 1.1.2 again. So far, so good.
Thanks RaiMan!

Thanks RaiMan, that solved my question.

hi,leo.xiao:
   I also have this Error,java.lang.Exception: unknown exception in win7
  and I change my sikulixapi version from 2.0.4 to 1.1.2,and the Error is gone;
  I think that is because of opencv_java's version and those libs its need is different;