Thanks CHAN for the help. It worked! <br><br>Best Regards,<br>Payman<br><br><div class="gmail_quote">On Fri, Aug 20, 2010 at 12:29 PM,  <span dir="ltr">&lt;<a href="mailto:chan@mcs.anl.gov">chan@mcs.anl.gov</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><br>
<br>
The top of c.txt has these lines:<br>
configure: WARNING: you should use --build, --host, --target<br>
configure: WARNING: invalid host type: /home/payman/Documents/1/MPICH2/Install<br>
Configuring MPICH2 version 1.2.1p1 with  &#39;-prefix=&#39; &#39;/home/payman/Documents/1/MPICH2/Install&#39; &#39;build_alias=/home/payman/Documents/1/MPICH2/Install&#39; &#39;host_alias=/home/payman/Documents/1/MPICH2/Install&#39; &#39;target_alias=/home/payman/Documents/1/MPICH2/Install&#39;<br>

<br>
It seems you had a typo in specifying prefix that triggers cross-compile build.<br>
Make sure don&#39;t put unnecessary space after =.<br>
<br>
&quot;./configure --prefix=/home/payman/Documents/1/MPICH2/Install ......&quot;<br>
<br>
A.Chan<br>
<div><div></div><div class="h5"><br>
----- &quot;Payman Karvani&quot; &lt;<a href="mailto:paymaan@gmail.com">paymaan@gmail.com</a>&gt; wrote:<br>
<br>
&gt; Hello,<br>
&gt;<br>
&gt; I am trying to configure MPICH2 on my UBUNTU 10.4 system but the<br>
&gt; following<br>
&gt; error happens.<br>
&gt;<br>
&gt; Thanks for any help,<br>
&gt; Payman<br>
&gt;<br>
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</blockquote></div><br>