Opening JCM5: some common issues

JCM5 requires Java 5 or higher

JCM5 will not work with any older versions of java.
Note: Java 5 is the same as J2SE 5.0 or Java version 1.5 (so 1.6 is OK, but 1.4 is not)

The applet below should indicate your Java version:
Your browser won't open the applet - try enabling active content!
If that doesn't work, try (re)installing the Java Runtime Environment before refreshing this page.
GetJava Download Button

You can download an updated Java Runtime Environment for free
GetJava Download Button

Java Cache

Java Web Start stores a cache of JCM5 which you can run offline.

Other problems

  • If your web browser disables active content, you must first enable it for these pages (e.g. note yellow bar that pops up at top of IE).
  • A jar file is a type of zip archive, but it should not be unzipped to run JCM.
    Some packaging applications try to unzip any files with extension ".jar" -in this case right-click, choose "open with"...=> "java executable".

    Back to JCM launch page