https://bz.apache.org/ooo/show_bug.cgi?id=95167

--- Comment #12 from Driss <[email protected]> ---
In the function Code the Newton's Method was used. The convergence of this
Method depends amongst others on the start value fResultRate, which is the
third argument of XIRR (guessed rate with default Value= 0,1). In case of
divergence one get the err502. Changing the guessed rate can help to get
convergence and avoid err502.

I will try to improve the code. If you have any idea or hints how to avoid
divergence of Newton's method it would be great.

May be the third argument for XIRR  should not be given by the user but
calculated in the code in a manner that divergence will be avoid as far as
possible?

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