[xwt-users] Null exceptions

I have a little problem. It seems that when the server
returns a fault to xwt and xwt throws an exception it
sometimes throws a null value as an exception. 
ie when I do something like 

 try 
  {
     //contact server and do stuff
     ...
  } catch (e)
  {
     if (e != null)
     {
         //Do some more stuff
           ...
      }
  }

 In the above example 'e' turned out to be null quite
often. So I put the 'e != null' guard in. Well it
seems that this will even cause a object is null
warning to be issued. Whats the problem here, why is
xwt throwing null exceptions at all, and why does a
test for null cause a null exception?

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