The problem is obviously in WriteStream>>pastEndPut:
 
Streaming should work for all SequencableCollections. 
Therefore you need to implement a method that grows a
SequencableCollection and also changes
it's size. It could be called something like changeSizeTo: aNumber. 

It's not that difficult, If I would have a few minutes left today ...


Markus


-- 
+----------------------------------------------------------------------------+
| Markus Kohler                          Hewlett-Packard
GmbH                |
| Software Engineer                      OpenView Software
Division          | 
|                                        IT/E Response
Team                  |
+----------------------------------------------------------------------------+