Hi, I was just reminded that in version 2019d nested arrays were introduced. Some small issues related to that: - The keyword "arrays" works but isn't syntax-colored. (Note to self: This would also have to be considered when pushing an update to the hansl definitions for the listings package for Latex.) - Section 10.8 of the guide seems to imply you can also use defarray() to create a nested array. However, the following doesn't work for me: <hansl> matrices M = defarray(I(2)) arrays AM = array(1) # works AM[1] = M # works AM += M # works delete AM arrays AM = defarray(M) # error about wrong datatype </hansl> It seems to me either it's a bug or we should clarify the documentation. thanks sven