Java ROBOT producing error in Excel -


I am looping through a column in Excel and searching for unique values ​​by saving it in an array: 

  string [] center = new string [30]; Robot robot = new robot (); Robot.delay (5000); Robot.mouserelease (InputEvent.BUTTON1_MASK); Robot.delay (1000); // For Scroll Down Columns (Int i = 2; I & lt; 5428; i ++) {robot.press (KAVENT.VICE_DOWN); Robot.delay (5); Robot.keyRelease (KeyEvent.VK_DOWN); Robot.delay (5); // copy tile robot KeyPage (KeyEvent.VK_CONTROL); Robot.delay (5); Robot.keyPress (KeyEvent.VK_C); Robot.delay (5); Robot. KeyRelease (Key Event .VK_CONTROL); // Get the contents of the tile string data = (string) Toolkit.getDefaultToolkit () .getSystemClipboard (). GetData (DataFlavor.stringFlavor); Robot.delay (100); // Check that tile is in Array for value (int l = 0; l <30; l ++) {if (center [el]! = (Data)) {centers [l] = data; }} // Columns through scrolling} Any separate tile content variables (intL = 0; l <30; l ++) {if (centers [L] .equals (" "}} {} Second {System.out.println (center [L]}}}}}}   
 The problem is that I created a pop-up after copying the first tile Something looks like: Error: Clipboard content can not be emptied, using other program clipboard. What can I do to successfully scan an Excel column?  
 
 
 
  OK 1   
 released while copying data C key  
  robot.keyRelease (KeyEvent.VK_C);   
 
  Fix 2   
 After making the content copy a few delays.  
 Excel can take some time to actually copy the data, it can be negligible to us, but it is not immediate matter to be sufficient to ensure something like 25-50 ms . You should check it to get the right minimum time  
 Hope this will help. 
 Best wishes

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