Hi, I don't know what the real problem with RStudio is, I try to explain my issue: at any moment while I have to do an histogram of a dataset, typing control+enter for run the comand, appears the advice (that I enclose here), it opens in a new window the "guideline of mass package" that I use in previous step to exploit the "fitdistr" command. I try to delete mass and download it again, restart the R session but all as before when I run the command.
Let me know, and excuse me for my english (IT)