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I get this error stack (probably different line numbers)

Is "null" all you see on the console? What statement puts that value on the console?

Good

Sorry, I do not understand what you are saying.
What statement/message is the word "null" in? Is it from a statement in your program?


What console is that? The command prompt, an IDE or what?

Please copy the text from the console window and paste it here. No links to images. I do not connect to other sites.

What statement prints the message with the word null in it? What is the full text of the message?
Can you open a command prompt window, execute the program, copy the contents of the command prompt...