Hi Erel,
A user
reported an error raised in the IDE.
Only in debug mode with a break point and going step by step through the code.
Otherwise it works OK.
To me it looks like a bug in the error checking.
To reproduce it you should use the source code of
SecondProgram from the Beginner's Guide (attached below).
In the routine
Sub btnEvent_Click in the image below it raises an error
Object should first be initialized (Button) when reaching the line
Select btnSender.Tag. Even initializing
btnSender.Initilize("") before
Select btnSender.Tag raises the same error.
Best regards.