I have just installed the latest Rstudio (Version: RStudio 2026.04.0+526 "Globemaster Allium" Release (57f8932a2d8c5a4a8c0d30ad918ec77f9f2dacaa, 2026-04-18) for windows
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2026.04.0+526 Chrome/142.0.7444.265 Electron/39.8.7 Safari/537.36, Quarto 1.9.36).
If I now try to render a notebook that I have been using for quite some time I get an error that the notebook can not be rendered because a dataframe ('dfSamples') was not found. I have run all individual code chunks. By process of elimination I have found that rendering breaks on inline code (``r max(dfSamples$date_received)`). It does not matter if I convert the date to character or if I first store the date in a separate variable that I then call inline. The 'date_received' is a POSIXct date. It worked fine with the previous version of Rstudio. The command works fine if I run it in the console. It breaks the rendering of the notebook and it will not render in an other format such as PDF. I have updated all packages. I have uninstalled and reinstalled rmarkdown. All without resolving the issue.
Has something changed in how inline code is handled in the new Rstudio version in relation to rendering rmarkdown? I have not been able to find an answer. Otherwise I may have to return to a previous version of Rstudio.
Thank you for our time and assistance.