OK, I easily reproduced it and hope Andrew can help fix it.

On Mon, Jan 18, 2021 at 1:09 PM Andrea paz via Cin <cin@lists.cinelerra-gg.org> wrote:
Also to me the rendering from the command line creates a dump (but the file is empty!). From inside CinGG everything is OK.

CinGG batch rendering also offers the possibility to render only an active region of the project, so the position of the insertion point is important. Generally it should be placed at the start.
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