TagData Init called on each change?

[Helper]

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On 24/03/2010 at 04:46, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   11 
Platform:      Mac OSX  ; 
Language(s) :     C++  ;

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Is there any way to prevent TagData->Init from being called in each and every value change?
Why does changing an attribute create a new instance?

Thanks

Klaus