[SOLVED] invalid use of incomplete type ‘class XCAFDoc_ShapeTool’

Hello,

I've been reading the documentation and many example from the forums, and I can not understand why the following code is failing:

Handle(TDocStd_Document) new_document = new TDocStd_Document("step-caf-reader");
Handle(XCAFDoc_ShapeTool) shape_tool = XCAFDoc_DocumentTool::ShapeTool(new_document->Main());

// Get the root labels
TDF_LabelSequence root_labels;
shape_tool->GetFreeShapes(root_labels);

I get:

146:19: error: invalid use of incomplete type ‘class XCAFDoc_ShapeTool’
  146 |         shape_tool->GetFreeShapes(root_labels);

I'm using OCC 7.8.1 and g++ 14.2.1

Any help is very appreciated !,

Thank you,