Error running applet, java.lang.UnsatisfiedLinkError: enableModeless

Question

hi guys
I write an applet with JDevloper 3.1 using Oracle's B4J to connect to oracle 8.1.5. In Jdev all works fine. After deploying with the wizard to a webserver und running the applet using JRE 1.2.2 i got the following exception:
Opening http://test.woow.at/awork/oracle/dacf/control/ResTable_de_DE.class no proxy
Opening http://test.woow.at/awork/oracle/dacf/control/ResTable_de_DE.properties no proxy
Opening http://test.woow.at/awork/oracle/dacf/control/ResTable_de.class no proxy
Opening http://test.woow.at/awork/oracle/dacf/control/ResTable_de.properties.class no proxy
Opening http://test.woow.at/awork/borland/jbuilder/addin/VersionedAddin.class no proxy
java.lang.UnsatisfiedLinkError: enableModeless
at sun.beans.ole.OleEmbeddedFrame.modalityPushed(Unknown Source)
at sun.beans.ole.ModalityListenerImpl.modalityPushed(Unknown Source)
at sun.awt.windows.WToolkit$ModalityListenerList.modalityPushed(Unkown Source)
at sun.awt.windows.ModalityEvent.dispatch(Unkown Source)
at sun.awt.windows.WToolkit.notifyModalityChange(Unkown Source)
at sun.awt.windows.WDialogPeer.show(Unkown Source)
at sun.awt.Dialog.conditionalShow(Unkown Source)
at sun.awt.Dialog.show(Unkown Source)
at oracle.dacf.control.swing.LoginDlg.show(LoginDlg.java:503)
at oracle.dacf.control.swing.LoginDlg.showDialog(LoginDlg.java:488)
at package6.Applet1.init(Applet.java:290)
at sun.applet.AppletPanel.run(Unkown Source)
at java,lang.Thread.run(Unkown Source)
any idea, thanx a lot
Armin

Answer 1

Armin,
I haven't seen this one before.
Is your browser set to run with German locale?
Here is my standard reply for problems with applet deployment in 3.1. It is probably the case that some classes available in the JDeveloper environment were not deployed to your web server environment.
Applet Deployment for JDev 3.1
Deployment issues for client and server:
1. Make sure you have the JDK 1.2 plugin installed on the client.
2. If your webserver and database are not on the same machine, you will have to configure your applet
differently, or install the Net8 Connection Manager. See the Oracle JDBC Developer's Guide for more
information (exact location of applet info depends on which version of the DB).
Creating your Applet within JDeveloper:
1. Create a new workspace.
2. Create a new Business Components project. You will define your data model and business logic in this
project. This is effectively your middle tier, but can be deployed to any tier you choose. In this
project you will use the Business Components wizard to create:
a. entity objects for each of the tables/views you want to develop against
b. view objects (and optionally view links, associations) for each of the entity objects or
combination of entity objects
c. application module(s) to represent your data model(s)
3. Save and build your business components project.
4. Create a new empty project to contain your applet code.
5. Launch the Infobus DataForm wizard to create your DAC applet. Choose the app module you created in
step 2 as a data source. (Alternately, you can create the applet from scratch using the controls and
binding your sessioninfo object to your app module).
Deployment Steps within JDeveloper:
1. Deploy your business components project.
a. decide how you will deploy your app module (local, visibroker, etc.)
b. if you decide to deploy in local mode, use the Deployment Profile Wizard and choose 'Simple
Archive', including all of the business components project's XML and .JAVA files in the archive.
c. if you will deploy to visibroker, see the online help for deploying your business components,
and see the Release Notes for additional changes you need to make to your applet project.
2. (if deploying BC4J project in local mode) Create a library using the archive you generated in Step
1. Add this library to your applet project from the Project Properties Libraries tab.
3. Clear out a directory on your local machine where the deployment wizard can copy everything you
need to deploy.
4. Deploy your applet project.
a. Run the JDeveloper Deployment Profile Wizard and choose the Web Application to Web Server option
on Page 1.
b. On page 2, select all of the .class files in your project that make up the applet.
c. Select all the libraries listed and shuttle them to the selected list. The contents of these
libraries will automatically be added to your applet's HTML file during deployment
d. Give the .jar file a name, and run the deployment to generate that jar file.
e. select the location of the 'clean' directory you created in step 3.
Deploying to your WebServer:
1. Copy everything that the deployment process placed in your 'clean' directory to your WebServer.
If you deployed your BC4J project locally, you will need to deploy the archive file containing your
business components to the webserver along with all of the other archives.
2. If you want to put the dependency archives in a different location from the applet's HTML file
under the webserver root, then you need to set the CODEBASE tag in the HTML file to the (relative)
location of the archives.
Troubleshooting:
1. Try both Netscape and IE. Different Browsers sometimes give different errors and one might be more
helpful/indicative of the problem's source.
2. Use the Java Console to get a more detailed stack trace. For Netscape, choose
Communicator->Tools->Java Console.
References w/in Oracle -
JDBC Developer's Guide
Net8 Admin Guide
Referenc es outside Oracle -
Borland JBuilder doc: http://www.borland.com/techpubs/jbuilder/jbuilder3-s/pg/applets.html
JavaSoft Plugin Download: http://java.sun.com/products/plugin/
JavaSoft Applets Resources Page: http://www.javasoft.com/applets/index.html
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