Rendering a book type project to PDF with multiple chapters yields a MultipleDefinitionError

[zaza183]

Rendering a book type project (as defined in _quarto.yml) with a single chapter renders well to PDF, however adding multiple chapters gives a MultipleDefinitionError: The variable 'mo' was defined by another cell error.

Follow example is created with quarto create project (type book) and quarto add marimo-team/quarto-marimo. Then use a index.qmd and index2.qmd both as this file index.qmd.

_quarto.yml:

project:
  type: book

book:
  title: "Big Book"
  author: "Norah Jones"
  date: "22.8.2025"
  chapters:
    - index.qmd
    - index2.qmd
    - intro.qmd
    - summary.qmd
    - references.qmd

bibliography: references.bib

format:
  html:
    theme:
      - cosmo
      - brand
  pdf:
    documentclass: scrreprt

which gives the following error

MultipleDefinitionError: The variable 'my_value' was defined by another cell
MultipleDefinitionError: The variable 'mo' was defined by another cell
MultipleDefinitionError: The variable 'my_value' was defined by another cell
MultipleDefinitionError: The variable 'mo' was defined by another cell
MarimoExceptionRaisedError: Name `mo` is not defined. It was expected to be defined in
MarimoExceptionRaisedError: Name `mo` is not defined. It was expected to be defined in
MarimoExceptionRaisedError: Name `mo` is not defined. It was expected to be defined in
MarimoExceptionRaisedError: Name `mo` is not defined. It was expected to be defined in

Rendering to a html target works perfectly though.

[dmadisetti]

Oh, very interesting. Thanks for reporting. I'll try to take another pass at the plugin sometime soon. I should be able to grab this and the other issue you reported.

Thanks for the feedback keep it coming if you run into more!