[Quantlib-users] Bootstrapping the inflation term structure with ZCIIS

[Diego D'A. <die...@gm...>]

Hi,

I have been trying to bootstrap the inflation term structure with ZCIIS
quote using Quantlib.

I am getting a "Runtime error: root not bracketed". Here is the code that I
have posted on StackOverflow:

https://stackoverflow.com/questions/72564838/python-quantlib-bootstrapping-the-inflation-term-structure-from-zciis-runtimee

I am new to Quantlib and I have been following the existing examples made
by other users. However, I have noticed that the
ql.ZeroCouponInflationSwapHelper()
and the ql.PiecewiseZeroInflation() objects have changed since the latest
posts.

Could anyone explain why the interpolation fails for the ZCIIS that I have
provided?

Many thanks,
Diego