diff --git a/func_deltdeltF.m b/func_deltdeltF.m
index 9aae298..8116328 100644
--- a/func_deltdeltF.m
+++ b/func_deltdeltF.m
@@ -3,7 +3,7 @@ function deltdeltF=func_deltdeltF(busNum,fsY11,Loadi,wV1r,wV1i,wI1r,wI1i,V1measu
 deltdeltF=[
   %zeros(busNum*2,busNum*2+length(Loadi)*2);
   sparse(Loadi,Loadi,-4*( -2*V1r(Loadi).*V1r(Loadi)+ abs(V1measurement).^2-(V1r(Loadi).^2+ V1i(Loadi).^2) )./[wV1r.*wV1r],busNum,busNum),sparse(Loadi,Loadi+busNum,-4*V1r(Loadi).*( -2*V1i(Loadi))./[wV1r.*wV1r],busNum,busNum+length(Loadi)*2);
-  sparse(Loadi,Loadi,-4*V1i(Loadi).*( -2*V1r(Loadi))./[wV1i.*wV1i],busNum,busNum),sparse(Loadi,Loadi+busNum,-4*( -2*V1i(Loadi).*V1i(Loadi)+ abs(V1measurement).^2-(V1r(Loadi).^2+ V1i(Loadi).^2) )./[wV1r.*wV1r],busNum,busNum+length(Loadi)*2);
+  sparse(Loadi,Loadi,-4*V1i(Loadi).*( -2*V1r(Loadi))./[wV1i.*wV1i],busNum,busNum),sparse(Loadi,Loadi+busNum,-4*( -2*V1i(Loadi).*V1i(Loadi)+ abs(V1measurement).^2-(V1r(Loadi).^2+ V1i(Loadi).^2) )./[wV1i.*wV1i],busNum,busNum+length(Loadi)*2);
   zeros(length(Loadi)*2,busNum*2),2*eye(length(Loadi)*2)*diag(1./[wI1r.^2;wI1i.^2]);
   %sparse(Loadi,busNum*2+Loadi,2,busNum,busNum*2+length(Loadi)*2);
 ];