B4A's error or my codes' error

[dreamworld]

"The indicator is not allowed to be zero-length. This ..."
I got such an error message. I am wondering whether it is a B4A bug or it was caused by my codes. The message was showed by a dialog box, not in the log box.

 

[Erel]

Where did you see this message? In the device or IDE?

 

[dreamworld]

It's a message dialog window from the IDE, not from my device. What's wrong?

 

[Erel]

Can you post a screenshot? When does it happen?

 

[dreamworld]

In a service, I initialize a class and then call a sub in the class. That sub is just to start a thread.
I suggest you search the error message text in the source code of B4A. If there is an error in my code, the IDE is supposed to show them in the logs box.

 

[dreamworld]

I will take a screenshot when I am not busy.