>I found the problem. One of the elements had entry "Y" in the 9th column. Your utility to see array as a table is super helpful. Thank you.
>
>But I am wondering how the "Y" got into this column. Do you know what should be in column 9?

You can find descripton of array columns in AFIELDS() function help. The 9th column is default value which a free table does not support.