mozilla.initXPCOM method

Javier,

I need to instantiate an nsIMutableArray (my component needs to return
an array). But I get an exception when calling initXPCOM method, even
after upgrading to JavaXPCom from XulRunner 1.9 .

The code below works well in JVM envoronment, but fails when called JVM
is started from Mozilla Firefox on the last line.

            System.loadLibrary("javaxpcomglue");
           
            java.io.File localFile = new java.io.File( mozillaPath );
           
            if ( localFile == null )
                throw new InternalError("Unable to open mozilla path
folder.");
           
            Mozilla mozilla = Mozilla.getInstance();
            mozilla.initXPCOM(localFile, null);

Am I doing something wrong?

Thanks,
Murilo