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Java applet won't run: ClassFormatError: Unknown constant tag 115

807600Nov 5 2007 — edited Nov 6 2007

Hi,
About two years ago I uploaded an applet to a server and it ran fine. Since then I've done minor tweaks to the applet and it works on my computer, but I recently uploaded it to a new server and now it gives me the following:

java.lang.ClassFormatError: Unknown constant tag 115 in class file chemlet
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

java.lang.ClassFormatError: Unknown constant tag 115 in class file chemlet
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

I've already checked that I uploaded everything in binary and that my .class files are intact on the server. In fact I uploaded my files and downloaded them back onto my computer and they run fine. Also I have another applet running smoothly on the same server (which also used to reside on the old server) and it's not having any problems. I have 9 .class files in total and all of them are uploaded. chemlet is the file where execution should start. Any ideas for what to do?

Thanks in advance.

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Locked on Dec 4 2007

Added on Nov 5 2007

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