Unable to start RT-LAB 10 (see C:\Opal-rt\RT-LAB10.x.x\Common\ui\configuration\1283538866500.log)

Question:

I am trying to open RT-LAB 10 but I get a pop-up error saying it cannot be started. It refers me to a file found under C:\Opal-rt\RT-LAB10.x.x\Common\ui\configuration. This file shows a lot of stuff like:

!SESSION 2010-09-03 13:34:26.125 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.6.0_17
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_CA
Command-line arguments:  -os win32 -ws win32 -arch x86 -data @noDefault

!ENTRY org.eclipse.osgi 4 0 2010-09-03 13:44:07.062
!MESSAGE An error occurred while automatically activating bundle com.opalrt.rtlab.application (57).
!STACK 0
org.osgi.framework.BundleException: Exception in com.opalrt.rtlab.application.Activator.start() of bundle com.opalrt.rtlab.application.
    at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:1028)

!ENTRY org.eclipse.osgi 2 0 2010-09-03 13:44:07.140
!MESSAGE The following is a complete list of bundles which are not resolved, see the prior log entry for the root cause if it exists:
!SUBENTRY 1 org.eclipse.osgi 2 0 2010-09-03 13:44:07.140
!MESSAGE Bundle reference:file:plugins/com.opalrt.rtlab.ui.tests_1.0.0.jar [65] was not resolved.
!SUBENTRY 2 com.opalrt.rtlab.ui.tests 2 0 2010-09-03 13:44:07.140
!MESSAGE Missing required bundle com.windowtester.runtime_0.0.0.

See attached file to see if yours looks like this one. What can I do?

Answer:

This can happen if multiple OpalDLoader are running on your host computer. Access the process running on the host computer (usually Ctrl+Alt+Delete will give you access). See if there are multiple OpalDLoader running. If yes, stop them all. Then, you'll have to relaunch the OpalDLoader in order for RT-LAB to work. To do so, open the Windows command prompt and type: OpalDLoader -s

If you look at the process running again, you should see one OpalDLoader only. Close the MetaController if it is open and reopen it. Try RT-LAB. Else, you can shutdown and restart the host computer, OpalDLoader will be set properly automatically.

1283538866500.log - Crash file