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              object --+                    
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exceptions.BaseException --+                
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        exceptions.Exception --+            
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                   PyXBException --+        
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                     ValidationError --+    
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                  ElementValidationError --+
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                                          ElementChangeError
Attempt to change an element that has a fixed value constraint.
    
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     Inherited from  Inherited from  Inherited from  Inherited from  Inherited from   | 
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        element = NoneThe pyxb.binding.basis.element that has a fixed value.  | 
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        value = NoneThe value that was to be assigned to the element.  | 
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     Inherited from  Inherited from   | 
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     Inherited from  Inherited from   | 
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 Create an exception indicating a PyXB-related problem. If no args are present, a default argument is taken from the 
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 str(x) 
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