Tobit函数中的泊松分布

Question

我想使用泊松分布作为Tobit模型的选项。但是，该选项不可用。这是R向我显示的确切错误：

Error in match.arg(dist, names(survreg.distributions)) : 
  'arg' should be one of "extreme", "logistic", "gaussian", "weibull", "exponential", "rayleigh", "loggaussian", "lognormal", "loglogistic", "t"