Below are some common problem listed, together with their solutions. If you can't find the problem you are experiencing here, please ask us for help in the loadUI forum. If you can install, but cannot not start, loadUI: please include the output from starting loadUI with the Java Console enabled (learn how to enable the Java Console on Windows or MacOS X) on your machine.

1. Common problems

1.1. Installing (and first time starting up) LoadUI without Internet connectivity

Problem description

If you try to install loadUI without Internet connectivity, you might run into this error: Unable to load resource: http://dl.javafx.com/1.3/javajfx-rt-win ... 1_b101.jar.

The reason for this is that loadUI needs to download a library called JavaFX 1.3.1 during installation. Unfortunately, we cannot bundle JavaFX in the installer because of licensing issues. Once installed though, you can run loadUI without an Internet connection.

Solution

The workaround for this is to first install JavaFX SDK 1.3.1 and the install loadUI on a different machine which has an Internet connection, and then copy the installation to the desired computer (the one without a connection). Finally, start loadUI with the loadUItest.bat file.

1.2. Certificate/jar-signing exceptions during startup

1. In a command line, enter these commands:
   1. javaws -uninstall
   2. javaws -clearcache
2. From the Control Panel, open Java.
3. In the Security tab, click Certificates.... Remove all Trusted Certificates. Then close this dialog.
4. Also go to the General tab, click Settings..., then Delete Files..., check all items and click OK.
5. Click Apply and then View....
6. Make sure that the list is empty for all views (use the dropdown in the upper-left corner to change views). If there are items left, remove them by selecting them and clicking the red X.
7. Reinstall loadUI.

1.3. Error: could not open [...] jvm.cfg

Solution

This is a problem with your Java installation. Reinstall your Java Runtime Environment (JRE).

1.4. When starting loadUI, a Java loading screen shows and disappears, then nothing happens

Problem description

Some users might also see a CouldNotLoadArgumentException. This is because of a bug in Java WebStart.

Solution

To fix this, open your computer's DOS prompt by selecting the Start Menu followed by the "Run" menu option. Then, enter "cmd" followed by the "Enter" key and your computer's command line prompt will be opened.

Type "javaws" at the DOS prompt followed by the "Enter" key to see the Java Web Start command-line options.

Enter "javaws -uninstall" followed by the "Enter" key to remove all files from the Java Web Start Cache on your computer. After the cache has been cleared, the local drive prompt will appear on the command line prompt.

1.5. Error message: "Failed to validate the certificate and application will not be executed"

Solution

Follow the instructions at this page.

1.6. loadUI doesn't start (on a system running Java 7)

Problem description

Some users having Java 7 installed on their machine, report troubles starting loadUI. When starting with the Java Console open, they see several occurences of BundleException in the log.

Solution

This is fixed in the nightly builds of loadUI 1.5.

1.7. Error message: "BadFieldException[ Cache must be enabled for nativelib or installer-desc support"

Solution

Make sure that the option Keep temporary internet files on my computer is enabled (click the Settings... button in Java Control Panel to find this option).

1.8. Other error, or above didn't help

Solution