Liveconnect call for Applet ID 1 is not allowed in this JVM instance

Depending on how far you already went to update your applets  to JRE 7, Build 25+ you will discover problems accessing your applet’s methods via JavaScript, depending on your Java Security Settings:

If a signed applet can be accessed via JavaScript if you set Java’s Security Level to „Medium“, but not if you set it to „High“, but receive an error like:

Liveconnect call for Applet ID 1 is not allowed in this JVM instance+


You probably forgot to update your manifest concerning


Caller-Allowable-Codebase: *