I am using the current version of RStudio, and have a project with several Rmds that has worked fine till today.
Both the project and all but one of the Rmds open in RStudio absolutely fine.
One Rmd with 200+ lines of code in shows as a 4KB file, but opens as blank.
This would be OK if I could open the Rmd with Notepad and retrieve the contents - it's a text file, after all. But Notepad shows the file as blank, too.
I've seen plenty of queries here and on Stack Exchange about Rmds showing blank in RStudio, but none have mentioned not being able to read the file in Notepad.
(I also tried to open the file in Word - it came out as a single page of squares as 1 word. Even if the content is scrambled - how? - it doesn't seem enough for a 4KB file.)