su: ignore --preserve-environment, it's mutually exclusive to --login.
Warning in file(file, ifelse(append, "a", "w")) :
  cannot open file 'times.csv': Permission denied
Error in file(file, ifelse(append, "a", "w")) : 
  cannot open the connection
Calls: runApp ... write.csv -> eval.parent -> eval -> eval -> <Anonymous> -> file
Execution halted