index out of range getselected

Hello,

i'm trying to write a script which deselect a previous selected node but i have this error:

\src\sdksource\general\dzscene.cpp(6551): Index out of range in DzScene::getSelectedNode()

The script:

var node=Scene.getPrimarySelection();

if (node) node.select(false);

DAZ 4.22.0.15

any idea ?

Thank you