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["asdf jkl;" <kerufe@xxxxxxxxx>]

Thanks for your reply.  Please find below a stripped down version of my
class:


public final class Example implements SikuliEventObserver {
    private final Region test;
    
    public Example(Region r)
    {
        this.test = r;
		
		//on a single pixel change, trigger onChange
        this.test.onChange(1, this);
        this.test.observeInBackground(99999999);
    }
    
    public void targetAppeared(AppearEvent ae) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    public void targetVanished(VanishEvent ve) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    public void targetChanged(ChangeEvent ce) {
        String myText = this.test.text();

        /*
         * insert into our db
         */
        this.dbInsert(myText);
    }
}


To address some possible immediate concerns you might have:

I used 
this.test.onChange(1, this); 
in the constructor and passed "this" into the onChange function because that's what implements the observer.  i saw no other way to do it.

i gave
this.test.observeInBackground(99999999);
the large value to keep it running forever.  i saw no function for Java (saw one for Python) that allowed the observer to observe in the background forever.  i restart the java app every week or so.

so, essentially whenever the observer detects a 1 pixel change in the
region, it calls the onChange event which grabs the text and puts it
into a database.  i have to use the OCR capability because the
application i'm monitoring doesn't have a normal windows control, and i
can't use Sikuli's getText capability.

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https://bugs.launchpad.net/bugs/1014870

Title:
  C [VisionProxy.dll] creates EXCEPTION_ACCESS_VIOLATION

Status in Sikuli:
  New

Bug description:
  Sikuli Version:
  RaiMan's Observer mod (using sikuli_script.jar and Observer), built off of Sikuli X rc3

  I'm using Java and incorporting the Sikuli observer to monitor a
  region.  Here is the Java dump when it fatals:

  [info] Windows utilities loaded.
  [RaiMan] observer started
  [info] Sikuli vision engine loaded.
  [info] Text Recognizer inited.
  #
  # A fatal error has been detected by the Java Runtime Environment:
  #
  #  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x034c3ba0, pid=5544, tid=5620
  #
  # JRE version: 6.0_31-b05
  # Java VM: Java HotSpot(TM) Client VM (20.6-b01 mixed mode, sharing windows-x86
  )
  # Problematic frame:
  # C  [VisionProxy.dll+0x93ba0]
  #
  Stack: [0x033e0000,0x03430000],  sp=0x0342e4f8,  free space=313k
  Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
  C  [VisionProxy.dll+0x93ba0]

  [error occurred during error reporting (printing native stack), id
  0xc0000005]

  Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
  j  org.sikuli.script.natives.VisionProxyJNI.Vision_recognize(JLorg/sikuli/script/natives/Mat;)Ljava/lang/String;+0
  j  org.sikuli.script.natives.Vision.recognize(Lorg/sikuli/script/natives/Mat;)Ljava/lang/String;+5
  j  org.sikuli.script.TextRecognizer.recognize(Ljava/awt/image/BufferedImage;)Ljava/lang/String;+13
  j  org.sikuli.script.TextRecognizer.recognize(Lorg/sikuli/script/ScreenImage;)Ljava/lang/String;+7
  j  org.sikuli.script.Region.text()Ljava/lang/String;+35
  j  streamerscraper.StreamerScraperStock.targetChanged(Lorg/sikuli/script/ChangeEvent;)V+100
  J  org.sikuli.script.EventManager.callChangeObserver(Lorg/sikuli/script/natives/FindResults;)V
  j  org.sikuli.script.EventManager.checkChanges(Lorg/sikuli/script/ScreenImage;)V+66
  J  org.sikuli.script.Region.observe(D)V
  j  org.sikuli.script.Region$1.run()V+8
  v  ~StubRoutines::call_stub

  VM Arguments:
  java_command: StreamerScraper.jar 5
  Launcher Type: SUN_STANDARD

  Environment Variables:
  CLASSPATH=.;C:\Program Files\Java\jre6\lib\ext\QTJava.zip
  PATH=C:\Program Files\ATI Stream\bin\x86;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files\Java\jdk1.6.0_22\bin\;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files\Sikuli X\libs;C:\Program Files\Java\jre6\\bin
  USERNAME=me
  OS=Windows_NT
  PROCESSOR_IDENTIFIER=x86 Family 15 Model 107 Stepping 2, AuthenticAMD

  ---------------  S Y S T E M  ---------------

  OS: Windows XP Build 2600 Service Pack 3

  CPU:total 2 (2 cores per cpu, 1 threads per core) family 15 model 107
  stepping 2, cmov, cx8, fxsr, mmx, sse, sse2, sse3, mmxext, 3dnow,
  3dnowext

  Memory: 4k page, physical 3406888k(2348932k free), swap
  5335432k(4039836k free)

  vm_info: Java HotSpot(TM) Client VM (20.6-b01) for windows-x86 JRE
  (1.6.0_31-b05), built on Feb  3 2012 18:44:09 by "java_re" with MS
  VC++ 7.1 (VS2003)

  time: Mon Jun 18 09:36:35 2012
  elapsed time: 28617 seconds

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