Conversion from XML back to FMB give exception error

Hi All,

I have Customer with the following issue.

Background
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Migrating his Data Base from from 9i to 11g R2.

In 9i Data Base we have stored some of the Object Libraries in the Data Base.
And we are referring this in their Forms as Property Classes.

Once migrated the Data Base now while connecting the Forms with that Data Base they are
facing the issue.

So to over come this problem they want to convert the FMB to XML and back to FMB again.

But this is causing an issue and not able to convert the XML to FMB.