Problema de nodo al agregar QTreeView al subproceso QT

BIAS0 := (C-MA(C,2))/MA(C,2)*100;

BIAS1 := (C-MA(C,12))/MA(C,12) *100;

BIAS2 := (C-MA(C,26))/MA(C,26)*100;

BIAS3 := (C -MA(C, 48))/MA(C,48)*100;

HXL:=V/CAPITAL*100;

D1:=INDEXC;

D2: =MA(D1,56);

DR2:=D1/D2<0.94;

E1:=(C- HHV(C,12))/HHV(C,12 )*10;

E2:=(C-REF(C,26))/REF(C,26)*10;

E1:=INDEXC;

D2:=MA(D1,56);

DR2:=D1/D2<0.