Differences between PowerShell ISE and Powershell.exe when using IO.FileSystemWatcher -

i have following powershell script running fine in ise, mean runs , waits files created before processing them. problem try run command line exits @ $oncreated = register-objectevent $fsw created -sourceidentifier filecreated -action call.

how can run commandline indefinitely e.g. waiting , processing each new file meets criteria in target folder?

i must missing something, first attempt @ using powershell advice on how working cmd line appreciated. if have suggestions on improvements i'd love hear them too.

#variables $folder = 'c:\de\live' $filter = 'lock.txt' $data_in = 'c:\de\live\data.txt' $data_out = 'c:\de\live\rmin\data.txt' $destination = 'c:\de\live\rmin\lock.txt'  #setup file system watcher on live dir watching file name , last write $fsw = new-object io.filesystemwatcher $folder, $filter -property @{     includesubdirectories = $false     notifyfilter = [io.notifyfilters]'filename, lastwrite' } write-host "----------------------------------------------------" write-host "monitoring: '$folder'"  $oncreated = register-objectevent $fsw created -sourceidentifier filecreated -action {     $path = $event.sourceeventargs.fullpath      if(test-path ($data_in)){         write-host "processing: data.txt"              try {             get-content $data_in | foreach-object {                  $output = $output + $_.trim() + "|"             }             $output = $output + "1"         }         catch {             $error[0]             unregister-event -sourceidentifier filecreated             write-host "error ocurred, monitoring stopped"             write-host "----------------------------------------------------"         }         {             write-host "processing: data.txt finished"             }          write-host "writing: data.txt rmin"          try{             $stream = [system.io.streamwriter] $data_out             $stream.writeline("add dave")             $stream.writeline($output)             $stream.close()              }         catch{             $error[0]             unregister-event -sourceidentifier filecreated             write-host "error ocurred, monitoring stopped"             write-host "----------------------------------------------------"         }         {             write-host "writing: data.txt rmin finished"         }          write-host "moving: lock.txt file rmin"          try{             move-item $path -destination $destination -force -verbose         }         catch{             $error[0]             unregister-event -sourceidentifier filecreated             write-host "error ocurred, monitoring stopped"             write-host "----------------------------------------------------"         }         finally{             write-host "moving: lock.txt file rmin finished"         }          write-host "deleting: data.txt"          try{             remove-item $data_in         }         catch{             $error[0]             unregister-event -sourceidentifier filecreated             write-host "error ocurred, monitoring stopped"             write-host "----------------------------------------------------"         }         finally{             write-host "deleting: data.txt finished"             write-host "----------------------------------------------------"             write-host "awaiting next file..."         }      }  }