Purpose With the Decimalseparator-command you can define the decimal separator sign (point or comma) that is used in calculations with  Set. As default, the point is taken if the user selected  logon language English, and the comma otherwise.
Example Decimalseparator "."
Format Decimalseparator "."

Decimalseparator UserDefault  The default (point or comma) is taken from the user’s profile, which is read when the command is executed the first time. A valid RFC user name and password are necessary for this function (GuiXT profile).