Dear @Kabirdas
Thanks for your reply. As usual, I should have given more detail.
I have a "tag" type dropdown as one of my fields in the table and I filter the options of the dropdown according to one of the values in the table for that row. Neither currentRow nor currentSourceRow seem to be available in the new version, unless I need to do it differently in the new version.
I found the docs useful, I read them twice, but they don't go quite deep enough, unless I've missed something.
Regards
Jeremy