Known errors using tab-containers (for documentation purposes): - depending on the with of the canvas a number of tab-pages can not be accessed in the modeler (so if conditionally some are shown and some are not). Known and reported since release 5. Solution: before editing rename all tab-pages to short names e.g. A B C D, remembering the original names until the tab-page appears, then edit it, then rename all tab-pages back to their triginal name, - rich text editor will not be editable if anywhere on the form is a tab-container (new in 5.14). Solution: create a pop-up for every rich text field to be edited.