You can still run into file contention with text files. Run this script on two different computers at the same time...

Code:

Break On

IF Open( 3 , "\\someserver\someshare\TEMP\LOG.TXT" , 5 ) = 0
  Do
    $x = WriteLine( 3 , @WKSTA + ": " + @TIME + @CRLF )
    Sleep 1
  Until @ERROR
ELSE
  BEEP
  ? "failed to open file, error code : [" + @ERROR + "]"
ENDIF