VWAP AFL warning 505: Division by zero

I am using below code for plotting VWAP.

_SECTION_BEGIN("VWAP");

Bars_so_far_today = 1 + BarsSince( Day() != Ref(Day(), -1));
StartBar = ValueWhen(TimeNum() == 093000, BarIndex());
TodayVolume = Sum(V,Bars_so_far_today);
IIf (BarIndex() >= StartBar, VWAP = Sum (C * V, Bars_so_far_today  ) / TodayVolume,0);
Plot (VWAP,"VWAP",colorOrange, styleThick);

_SECTION_END();

I am getting below warning while checking for errors.

warning 505:Division by zero.Divisor array [0] is equal zero

How can I remove this warning.

@anoop see this thread:

Before posting a question, a search in the forum is always a good thing to do as recommended here.