E2246 Need to specify at least one dimension for SetLength of dynamic array (Delphi)

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The standard procedure SetLength has been called to alter the length of a dynamic array, but no array dimensions have been specified.

program Produce;

  var
    arr : array of integer;

begin
  SetLength(arr);
end.

The SetLength in the above example causes an error since no array dimensions have been specified.

program solve;

  var
    arr : array of integer;

begin
  SetLength(arr, 151);
end.

To remove this error from your program, specify the number of elements you want the array to contain.