/text/scalc/00/00000004.xhp To access this function... More explanations on top of this page. In the %PRODUCTNAME Calc functions, parameters marked as "optional" can be left out only when no parameter follows. For example, in a function with four parameters, where the last two parameters are marked as "optional", you can leave out parameter 4 or parameters 3 and 4, but you cannot leave out parameter 3 alone.UFI: see #i43239# and #i3879# Codes greater than 127 may depend on your system's character mapping (for example iso-8859-1, iso-8859-2, Windows-1252, Windows-1250), and hence may not be portable.