Issue after rebuild of java file

Hi,
I am using the JDEV11.1.2 and i migrated the source from JDEV11.1.1.5.
If i do any changes and rebuild it then am trying to proceed further in the applicaion means am getting the below error along with inactive message.
oracle.adf.controller.internal.binding.DCTaskFlowBindingDef cannot be cast to oracle.adf.controller.internal.binding.DCTaskFlowBindingDef
is this new JDEv11.1.2 requires any registration?
Reg,
Brahma B.

solutions got are
I have also seen this error intermittently. The only solution to this is clear classes directory and start the server.
This is a ClassLoader issue. I'm guessing you have two adf-pageflow-fwk.jar on your classpath, maybe one in your WAR and maybe WebLogic's internally deployed ADF Library.
when i delete some components with in the JSFF (that are bound to a manged bean), the page is running fine
Strange error message

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          "Kammau" <[email protected]> wrote:
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          >Hi All,
          >How to view the change immediately after a java file that is used in
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          >
          >Kammau

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Tried~
The problem is still here~ >___<
Anyway, thanks for information sharing~
The message is:
Cannot open file: it does not appear to be a valid archive.
If you downloaded this file, try downloading the file again.
The problem may be here:
if (fos != null)
fos.close() ;
if (bos != null)
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if (zos != null)
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if (file != null)
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