an class="comment">% Copyright (c) 2009-2011 by Anders Brandt</span>
0035 <span class="comment">% Email: abra@iti.sdu.dk</span>
0036 <span class="comment">% Version: 1.0 2011-06-23</span>
0037 <span class="comment">% This file is part of ABRAVIBE Toolbox for NVA</span>
0038 
0039 <span class="keyword">if</span> p(1) == 0
0040     error(<span class="string">'Rigid body modes are not allowed!'</span>)
0041 <span class="keyword">end</span>
0042 
0043 <span class="keyword">if</span> nargin &lt;= 3
0044     erro