The Java-based sketch tool is only tested for Java 1.7.0 update 25, and newer versions will not work properly, or at all.

There are alternative solutions to this problem:

1) Download a previous Java version (available from here: Java Download )

To downgrade, you need to first uninstall the currently installed Java first. Open the Windows Control Panel, select "Programs" or "Uninstall a program", select the Java version to uninstall from the list of installed programs (there may be more than one installed at a time). You then may have to reboot, if the system asks you to - do so. After the reboot, install the downloaded version, or go to the website and install it directly from it.

 

 2) Use the new sketch tool that does not require Java, the Svg Editor. This is available as an option in drop down in the sketch area, when no sketch has been added to the document.

If there is a sketch attached to the document, you first have to press the "Convert" button in the sketch area. The sketch will then be converted to SVG, and can then be opened in the svg editor.

 

3) With Java 1.8 and higher, you can use the Java site Exception List to override the security block.

Steps to Add URLs to the Exception Site list

  • Go to the Java Control Panel (On Windows Click Start and then Configure Java)
  • Click on the Security tab
  • Click on the Edit Site List button
  • Click Add in the Exception Site List window
  • Click in the empty field under the Location field to enter the URL
  • Click OK to save the URL that you entered
  • Click Continue on the Security Warning dialog

 

4) For java 1.7 update 45, you can also change the security settings of Java to allow the sketch editor to run. Open the Java control panel, select the Security tab, and change the slider to "Medium". Click OK to close the control panel.