R help - Apr 2006 - Need R-help

Dear r users,
   
  I was trying to fit a garch(1,1) model to my dataset. But while executing I
got a warning message "NaNs produced in: sqrt(pred$e)". And got the
estimated sd's along with five "NA", but as per my best knowledge
I should get only one "NA" i.e. corresponding to the first observation
only. If anyone tell me why I got this message it will be a great advantage for
me.
   
  With regards,



thanks in advance
				
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