hello everyone I have encountered a problem running NEWTON RAPHSON load flow code in 69 bus system.

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Amir Hosseini
Amir Hosseini 2020-5-10
评论： Amir Hosseini 2020-5-10
Index in position 1 is invalid. Array indices must be positive integers or logical values.
Error in LFNEWTON69 (line 18)
Ybus(nl(k),nr(k))=Ybus(nl(k),nr(k))-y(k)/a(k);
and also with some line and bus data I get the error that the code cannot be converged.
can anyone help me with the code and 69 bus system data?
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Amir Hosseini
Amir Hosseini 2020-5-10
then it won't be converged again and that's the error:
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.

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