Openning programatically a TopComponent

Hi,

I am openning a TopComponent for a DataObject with this code after
performing an action:
[code]TopComponent tc = MultiViews.createMultiView("text/experiment+xml",
expDO);
tc.open();
tc.requestActive();[/code]

This works fine, but if I double click in the node of the DataObject, a new
TopComponent is opened even though a TopComponent is just opened for it.

However, if I only open a TopComponet with double click, always one and
unique TopComponent is opened for the DataObject.

This behaviour only happens when I open a TopComponent with the code above.
I suspect that the TopComponent is not registered in the
TopComponent.registry, but I don't know how to achieve this.



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