"Error:null" problem when clicking on diagram view of .bpel file

Hi all,
At the moment, my bpel process complies fine and get no run time error, but when I click into .bpel file, I get an Error:null error, I am not too sure what this means. I also notice that thhe Bpel structure window in the corner is empty.
Please help!!!
Sonia

The error disappeared the next day. I did not restart jdeveloper or my computer.
Is it a bug from Jdeveloper? I am using 10.1.3.1.0.

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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        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    Edited by: M.M. on Sep 2, 2009 3:23 AM

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