nbsp;improper&nbsp;input&nbsp;parameters.
<P>
<BR>&nbsp;&nbsp;<I>info</I>&nbsp;=&nbsp;1&nbsp;&nbsp;algorithm&nbsp;estimates&nbsp;that&nbsp;the&nbsp;relative&nbsp;error
in the sum of squares is at most <I>tol</I>.
<P>
<BR>&nbsp;&nbsp;<I>info</I>&nbsp;=&nbsp;2&nbsp;&nbsp;algorithm&nbsp;estimates&nbsp;that&nbsp;the&nbsp;relative&nbsp;error
between x and the solution is at most <I>tol</I>.
<P>
<BR>&nbsp;&nbsp;<I>info</I>&nbsp;=&nbsp;3&nbsp;&nbsp;conditions&nbsp;for&nbsp;<I>info</I>&nbsp;=&nbsp;1&nbsp;and&nbsp;<