Help with Error in Newtown raphson

Here zi and ki are predefined matrix.

[Jan]

Do you get an error message or do you want to control the local error?

Please post your code and on demand a copy of the error message. This screenshot is not useful to explain, what you are asking for.

[Torsten]

@Jan

Seems the OP does not know how to code Newton's method for the Racford-Rice equation.