Following the update (on Windows 10), attempting to run any Markdown script fails immediately with:
Error: unexpected end of input
For example, start a new R Markdown file and just accept the default example script it generates (I chose Word output|). Run this script without any changes and I get the error.
In the console I see:
unable to open file 'C:/Users/Stuart/AppData/Local/RStudio-Desktop/notebooks/7CF3D93D-test_word/1/s/c2fk33oaayies_t' for writing opening device failed
Error in (function (filename = "Rplot%03d.png", width = 480, height = 480, :
unable to start png() device
If I check through File Explorer, the directory C:/Users/Stuart/AppData/Local/RStudio-Desktop/notebooks/7CF3D93D-test_word/1/s/c2fk33oaayies is there, but the folder name does not have the trailing "_t" from the temporary file name in the error message. Hence it seems to be trying to create this temporary file in a non-existent folder and is, not surprisingly, failing.
Is this a new bug in this preview release of RStudio?