If you tell me an upgrade from v4.20 is required, I'll do it. On the other hand, I don't want to be sidetracked in upgrading right now if that won't help with the immediate problem. I just have to fix this. The problem I reported here yesterday is an urgent show stopper.
I have re-created my edit form, populated it with a TWPrichtext, a TWPToolBar, a ruler and a gutter. I removed the old dfm, pas, and dcu files from the source folder.
My program creates the form and does ShowModal, which is where an AV exception happens.
frm:= tfrm.Create(nil);
frm.ShowModal; <== AV here.