Can not see the design view nor the java file in CentOS

Hi all. I've recently installed JSC2 in CentOS. I find this tool really useful. But I have a problem with the design view and the java file view. At the beginning, when I first create a Page1.jsp, I can see the design view and the java view with no problem. I run apps correctly. But after a while, I get a "null pointer exception" error and I am able to see only the jsp view, not the others. I don't even have the option to see the Design and Java views. And the page icon in the project window appears to be darker than a well working page. I'm not really sure what sequence of actions I do to get this error, it just suddenly happens. What I've done so far in JSC2 is to link to pages in the Page Navigation view. It works fine for a while, but after a while I get the error I've described.

Yes, if I do that It happens the same. I've tried everything. Now I'm using Window$ 2000 and it works properly. Thanks anyway.

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