Errata and comment on the paper
N. Disveld, T.H. Koornwinder and J.V. Stokman,
"A nonsymmetric version of Okounkov's BC-type interpolation Macdonald 
polynomials",
Transformation Groups 26 (2021), 1261-1292; 
arXiv:1808.01221v5 [math.QA].

Errata:

paragraph before Definition 3.8:
\rho_i:=t^{n-i} --> \rho_i:=n-i

in arXiv v5 (correct in journal article):
three lines before Theorem 4.6:
f(\alpha) --> \overline{f}(\alpha)

Comment by Tom Koornwinder:
See for a proof of Lemma 2.2, i.e. of Sahi's result in [37, p. 277],
the Proof of Lemma 2.3 in the earlier arXiv version arXiv:1808.01221v4 [math.QA] of our paper.