su: ignore --preserve-environment, it's mutually exclusive to --login.
Warning in readLines(file, warn = FALSE) :
  invalid input found on input connection '/home/ndg411/ShinyApps/Nomogram/app.R'
Error in parse(file, keep.source = FALSE, srcfile = src, encoding = enc) : 
  invalid multibyte character in parser at line 181
Possible extra comma at:
383:                              dataset_UI("testisDataset"),
                                                             ^
Error in sourceUTF8(fullpath, envir = new.env(parent = sharedEnv)) : 
  Error sourcing /home/ndg411/ShinyApps/Nomogram/app.R
Calls: runApp ... shinyAppDir -> shinyAppDir_appR -> appObj -> func -> sourceUTF8
Execution halted