B4J Question Sub appstart signature does not match expected signature

[tex22]

Hi,

I'd downloaded B4A-Websocket example and all tests were OK. I created a new B4J project and copied the whole code from B4A-Websocket. When I run it, no process is created and I receive this error:

Program started.
main.start (java line: 36)
java.lang.Exception: Sub appstart signature does not match expected signature.
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:95)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:84)
at b4j.tex22.main.start(main.java:36)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)

Sorry for my english.

Tks,

 

[Roycefer]

Did you copy and paste the code into a UI project or a non-UI/server project? UI projects cannot run the jServer library.

 

[tex22]

Bingo! Tks

 

[Roycefer]

I should point out, though, that you CAN run WebSocket CLIENT code in a UI app. That is, you can have a B4J UI app connected via WebSocket to a server app. But server apps have to be non-UI, themselves.