How can I simulate daily instead of monthly in my Monte Carlo simulation for CVA?

Using the mathworks guide for calculating CVA, however I want to simulated different frequencies, daily, weekly, monthly, quarterly, yearly.

% Compute monthly simulation dates
simulationDates = datemnth(Settle,0:1:60)';
numDates = numel(simulationDates);

I changed this to

% Compute monthly simulation dates, then quarterly dates later.
simulationDates = days360(Settle,Maturity)';
numDates = numel(simulationDates);

I have a portfolio of 5 years, with 360 days, making it 1800 simulationdates

However the thing I get stuck on is the following code for dt in the Hull-White model

dt = diff(yearfrac(Settle,simulationDates,1));
nPeriods = numel(dt);
scenarios = hw1.simTermStructs(nPeriods,...
    'nTrials',numScenarios,...
    'deltaTime',dt);
Because I don't get a proper array with for dt now, there are cell containing 0. Instead of every cell being (5/1800). Does anyone know a proper function instead of yearfrac for this?

The errors I'm getting

Error using HullWhite1F/simTermStructs (line 210)
NPERIODS must be a positive scalar integer.

Error in CVA_example (line 74)
scenarios = hw1.simTermStructs(nPeriods,...

Mathwork example: Mathworks CVA