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You do not need to worry about RTF fields, TRichView saves all this stuff automatically. As for checkpoints, see RichView Items' "Checkpoints" Overview in the help file. In editor, they are inserted with SetCurrentCheckpointInfo. The latest version also has an alternative method InsertChec...

There is a mistake in the help file, this method was removed already (it was in very old version). New versions of Delphi/Builder have this method in collection by default. TextStyles->Delete(i) is the same as TextStyles->Items[i]->Free(); (and almost the same as delete TextStyles->Items[i]; )

You cannot start live spelling when the TRichViewEdit is not formatted. You cannot start it in TDBRichViewEdit.OnLoadDocument. This event occurs after the document is loaded, but before it is formatted. Solutions: 1) If RTFMemoPad.LiveSpellingMode=rvlspOnChange, live spelling will start after making...

Yes, I agree, it is highly possible that this error occurs because of code in some event. Error occurs when accessing some component on form that is already destroyed.

You cannot use this event to make changes in document. Any error is possible if you do it.
Please redesign your application to make changes in another place.

Place a breakpoint in TRichView.Destroy. Calculate how many times it is called (may be it is called twice for the same TRichView)

When caret is inside table, you can call code to split this table in two parts and insert page break between: http://www.trichview.com/forums/viewtopic.php?t=586
Otherwise, this command must be disabled when the caret is inside table cell (when RichViewEdit.InplaceEditor<>nil)

When an item (especially a component) has been removed without formatting TRichView, AV usually occurs

It should not happen.

Try to upgrade to the latest TRichView version

http://www.trichview.com/support/files/dbeditdemo.zip This is an analog of the demo Demos\Delphi\Editors\Editor 2\, but with TDBRichViewEdit instead of TRichViewEdit. This demo implements basic commands for changing text and paragraph attributes (without RichViewActions) This ZIP file includes sever...

For the upcoming release of new version of TRichView and for adding ScaleRichView to the site, we need to update German, Spanish and Portuguese(BR) versions of TRichView site. It will not be too large amount of work, I do not think the text would exceed one page (may be two pages). Native speakers a...

You should not be able to insert page break in table cells.

You can move caret to the end of this item. If this item is not in table cell, and you know its index (ItemNo), the code is: rve.SetSelectionBoudns(ItemNo, rve.GetOffsAfterItem(ItemNo), ItemNo, rve.GetOffsAfterItem(ItemNo)); The editor will be scrolled to show the caret, but not necessary in the mid...

I recommend to upgrade to the newer version.
I can open access to the protected section of this form for you. Send me a private message with e-mail address you used when ordered TRichView.

A guess, may be stupid: may you create RichViews dynamically passing some form as an Owner parameter. When this form is freed, it frees all its controls, including these RichViews. When, in some other place, you free all RichViews in your array, and the error occurs.