Forum Discussion

BooHyunJang's avatar
Occasional Contributor
4 years ago

CodeCollab GUI Error

java.lang.NoClassDefFoundError: javax/xml/ws/http/HTTPException
at com.smartbear.ccollab.GuiMain.getMainCommand(
at com.smartbear.ccollab.GuiMain.main(
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(
at java.base/java.lang.reflect.Method.invoke(
at com.exe4j.runtime.LauncherEngine.launch(
at com.exe4j.runtime.WinLauncher.main(
at com.install4j.runtime.launcher.WinLauncher.main(
Caused by: java.lang.ClassNotFoundException:
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(
at java.base/java.lang.ClassLoader.loadClass(
... 9 more


MY DeskTOP OS : Win10

MY JAVA version : 1.8


In what cases do you get an error like the one above?

Tell me the solution.

1 Reply

  • OlegB's avatar
    SmartBear Alumni (Retired)

    Hello BooHyunJang,


    This error may indicate corrupted instances of both Collaborator client or Java. It also can be caused by an unsupported Java vendor. Try to follow the steps below:

    1. Uninstall the Collaborator client.

    2. Launch the command prompt as administrator.

    3. Navigate to the location of the Collaborator client installer and run it from the command prompt as below:

    the_name_of_the_executable_file -manual


    When the client installer is executed with the -manual option, it will ask you to provide the path to the Java location. If you see any exceptions, post them here. 

    4. Check if the issue exists after re-installing the client. 


    If the issue still occurs, try to uninstall Java completely, install Oracle Java 1.8, and follow the steps above one more time.