Tobit: lm.fit(X)的错误。vlm y = z。vlm，…):NA/NaN/Inf in 'x'(模拟数据)

I'm conducting a Monte Carlo study. I have a linear model with heteroskedasticity and left censoring of the dependent variable at 0. The mean of censoring rates is 25.9.I'm conducting a Monte Carlo study. I have a li