Thanks Moritz,

But to recover the old values I have now:

  open(STDOUT, ">&SAVEOUT");
  open(STDERR, ">&SAVEERR");
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¿Can I use this with lexical variables? i.e.

  open(STDOUT, ">&$SAVEOUT");
  open(STDERR, ">&$SAVEERR");
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It will not produce a interpolation of the filehandle?

Casiano