Troubleshooting
  • Null Pointer Exception
  • Applet CoolBE can't start
  • Animated Image Is All Black
  • Netscape Problems
  • There are only a few problems known. We hope this file can help you to solve yours. Otherwise, please send e-mail to Tech@CoolBE.com. We will answer your e-mail and help you.

    Null Pointer Exception

    The display area is just a gray box with no animation for a long time. When you move the cursor onto the gray area, you see the message on the status line (screen lower left):
        Applet CoolBE exception:Java.lang.Null Pointer.Exception

    Why does this happen?

    The problem may occur when you are running CoolBE both from your local drive and from a web site.  There is a conflict between cached and disk files.

    How to Fix

    • Restart your computer to refresh the memory.  Then the files should be loaded from the same location.
    • Delete your browser's cached files.  Use the browser option to Clear Cache and Clear Memory.

    Applet CoolBE can't start

    The display area is just a gray box with no animation for a long time. When you move the cursor onto the gray area, you see the message on the status line (screen lower left):
        Applet CoolBE can't start:class CoolBE not found

    Why does this happen?

    The file CoolBE.class has a wrong name or a wrong format.

    How to Fix

    • Make sure the CoolBE.class file is in the same directory as your HTML file. 
    • If you used a DOS unzip that chopped the name to CoolBE.cla, you can change it back to CoolBE.class, and change the Engine.cla to Engine.class. Better yet, download Winzip to unzip the files again.
    • When you upload to your web site, make sure you uploaded the *.class files as binary files.

    Animated Image Is All Black
    See Null Pointer exception, for the same cause and fixes.

    How to Fix

    You may have this problem using a 256 color GIF image.  Try converting the image to a full-colored JPG or JPEG format.

    Netscape Problems
    CoolBE has some problems with Netscape:
  • Netscape 4.0 prevents all Java applets to access local drives. It does give a bypass though. Unfortunately, neither the prevention or the bypass works properly. CoolBE sometimes can not start with Netscape from your local computer.
  • Netscape 4.0 also has problems displaying a image if the image is scaled. The image sometimes shows in wrong color or shows blank.

    Choose a method below to fix them:

  • Netscape 4.5, preview release now availble for download, has fixed these problems. Download Netscape 4.5 PR to run CoolBE.
  • If you have Netscape 3.xx or Microsoft Internet Explorer, use that browser to run CoolBE locally.
  • Read the Netscape security settings to understand the options and the risks, and use the PrefWrangler to change your Netscape security settings to allow CoolBE to access local files.
  • You may like to make CoolBE online instead.