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problem with setting data from p:dataTable

 
Greenhorn
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Hi
I have a problem with setting data from p:dataTable with dynamic nr of columns.
I list my Enity class Affiliations in Y and a linked list with Integer in X, they also have a String heding.
Everything works fin until I post the form, for save or to get new columns.
Anybody know why?
If I change from <h:inputText/> to <h:outputText/> it works fine, but I need to be able to change the data.
I use JSF 2.0 with PrimeFaces 2.0 on Glassfish V3




Facelet:


Controller: (left out includes)


Stacktrace:
 
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