I did install CodeTyphon 1.50.
My terrible application did not work again.
But I did decide to install CodeTyphon 1.50 on my old computer.
I did it and I did create a totally new simple application using the same SQLdb components for work with Firebird database.
I did create a new Firebird database.
It was a happy Idea, because it was successful at Design-time, it was successful later at Run-time.
Then I did copy this happy Application on my current Computer.
It was a successful test.
So, I don't know what is the reason, but now I can work with CodeTyphon 1.50 and SQLdb components connected to Firebird database.
Thank you very much everybody
