Fix CFI code following SciTech work

Quick fix of the CFI code based on the AIAA SciTech work. One skips the new type of CFI objects being groups of bodies. The other one skips non-numbered nodes instead of throwing an error.

library/NekMeshUtils/CADSystem/CFI/CADSystemCFI.cpp

@@ -101,7 +101,8 @@ bool CADSystemCFI::LoadCAD()
         {
             if (m_verbose)
             {
-                cout << "\tHas multibodies and instructions to mesh, this is not "
+                cout << "\tHas multibodies and instructions to mesh, this is "
+                        "not "
                         "possible"
                      << endl;
             }
@@ -125,7 +126,7 @@ bool CADSystemCFI::LoadCAD()
     m_scal = 1.0;
     if (model->getUnits() == cfi::UNIT_INCHES)
     {
-        if(m_verbose)
+        if (m_verbose)
         {
             cout << "\tModel is in inches, scaling accordingly" << endl;
         }
@@ -134,7 +135,7 @@ bool CADSystemCFI::LoadCAD()
     else if (model->getUnits() == cfi::UNIT_MILLIMETERS ||
              model->getUnits() == cfi::UNIT_MILLIMETRES)
     {
-        if(m_verbose)
+        if (m_verbose)
         {
             cout << "\tModel is in mm, scaling accordingly" << endl;
         }
@@ -155,6 +156,12 @@ bool CADSystemCFI::LoadCAD()
 
     for (int i = 0; i < bodies.size(); i++)
     {
+        // check that it is not a group of bodies
+        if (bodies[i]->getTopoSubtype() == cfi::SUBTYPE_COMBINED)
+        {
+            continue;
+        }
+
         vector<cfi::Oriented<cfi::TopoEntity *>> *faceList =
             bodies[i]->getChildList();