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I thought that the scope was the function and not the branch ! I must learnt more on Erlang !! Thanks > >On 3 Apr 2009, at 1:57 am, Gamoto wrote: > >> I don't understand. After the reception of the filename the variable >> S is defined ! > >*IN THAT BRANCH*. > >It's defined in one branch of the 'receive', >but used in the other, where it is _not_ defined. >