Found the following significant warnings:

  Warning in IF.Sxw * solve(Sww) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in -Sxw * solve(Sww) * IF.Sww : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in -Sxw * solve(Sww) * IF.Sww * solve(Sww) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in Sxw * solve(Sww) * IF.Swx : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in -solve(A) * IF.A : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in -solve(A) * IF.A * solve(A) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in -solve(A) * IF.A * solve(A) * B : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in IF.Sxw * solve(Sww) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in -Sxw * solve(Sww) * IF.Sww : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in -Sxw * solve(Sww) * IF.Sww * solve(Sww) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in Sxw * solve(Sww) * IF.Swy : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in solve(A) * IF.B : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in b1 * IF.Mx : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in IF.Sxw * solve(Sww) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in -Sxw * solve(Sww) * IF.Sww : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in -Sxw * solve(Sww) * IF.Sww * solve(Sww) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in Sxw * solve(Sww) * IF.Swx : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in -solve(A) * IF.A : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in -solve(A) * IF.A * solve(A) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in -solve(A) * IF.A * solve(A) * B : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in IF.Sxw * solve(Sww) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in -Sxw * solve(Sww) * IF.Sww : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in -Sxw * solve(Sww) * IF.Sww * solve(Sww) : Recycling array of length 1 in vector-array arithmetic is deprecated.
  Warning in Sxw * solve(Sww) * IF.Swy : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in solve(A) * IF.B : Recycling array of length 1 in array-vector arithmetic is deprecated.
  Warning in b1 * IF.Mx : Recycling array of length 1 in array-vector arithmetic is deprecated.
Deprecated functions may be defunct as soon as of the next release of
R.
See ?Deprecated.