Hello, the file created in geogebra 6 works in Windows 7, but it works on Windows 10, and the file does not work.
The file is working.
The problem is that in this special case the two lines are overlapping, so there isn't a unique solution for the point A of intersection, and the point is therefore not defined.
You should modify your displayed text and show it only when A is defined.
See IsDefined command - add IsDefined(A) as condition to show your text containing the coordinates of the intersection.
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