B4J Question [B4J] The specified Visual is not a descendant of this Visual.

[labcold]

Similar to https://www.b4x.com/android/forum/threads/the-specified-visual-is-not-a-descendant.54650/

Running a B4J console / server app [v9.50 64bit] in release mode from the IDE [so I can see my debug info to find this error] on windows server 2012R2.
This is a server app running websockets to standard browsers.

This has been running for some time in earlier versions without this error but the following error has now occurred 4 time in three weeks

[IDE message - 10:01:23]
An error occurred.
The specified Visual is not a descendant of this Visual.

There are no UI elements just served HTML, internal libraries

plus

    #AdditionalJar: mysql-connector-java-5.1.48-bin

Application just terminates and has to be restarted. No other errors are reported and it doesnt seem to happen if running in debug mode.
Its difficult to track as it intermittent and I cant find any particular event that triggers it from the logs.
Has anyone got any ideas as to what might be the cause / rectification?

 

[Erel]

It is hard to say what causes it, but it happens in the IDE, not in your app.
Don't run the app in production from the IDE. Run it with a batch file or from the command line. It is very simple to redirect the logs to a file.

 

[labcold]

OK thanks for that information.
Normally it does run in a command window but I got an exception which caused a crash so started looking for the issue using the IDE.
That was when I found the "IDE error" and assumed that it was that which caused the original exception.
Obviously I have another issue somewhere so back to the debugging :O