This widget is a field where users can indicate 
the name of the restart file (corresponding to a previous calculation).
This field is accessible only if the check-box  "restart calculation" 
has been activated in the window "Control".
Authors advise is rather to use the button located at the right, to choose 
the name of the restart file in a list of files. It has generally 
the extension ".res".
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 SYRTHES version   : VERSION_SYRTHES
 Name help file  : Fn_Rs_lne.html
 I. Rupp, C. Peniguel  -  may 2014
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