Did you upload into Guvnor the jar where all the classes you are using in your processes are?<div><br></div><div>Best Regards, <br clear="all"><br>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX<br><br>Esteban Aliverti<br>- Developer @ <a href="http://www.plugtree.com" target="_blank">http://www.plugtree.com </a><br>

- Blog @ <a href="http://ilesteban.wordpress.com" target="_blank">http://ilesteban.wordpress.com</a><br>
<br><br><div class="gmail_quote">On Mon, Jun 11, 2012 at 9:17 PM, sumatheja <span dir="ltr">&lt;<a href="mailto:sumatheja@gmail.com" target="_blank">sumatheja@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

Hi All,<br>        I&#39;ve a set of bmpn2 processes. When I try to compile them locally, its compiles fine. But when I upload them to the Guvnor and try to build the package, I get the below mentioned error for <b>each and every process</b>.<br>



<br><b>unable to build expression for &#39;constraint&#39; null&#39;: java.lang.NullPointerException</b><br><br> I tried validating each process using the jbpm designer and they show no errors. Can someone help me with this. Thanks in advance.<span class="HOEnZb"><font color="#888888"><br>



<br><br>-- <br>cheers<br>Sumatheja Dasararaju<br><br><br>
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