R语言代码遇到的报错 unexpected symbol

我需要用mice包进行多重插补加载好数据集和Mice包后就这样了

imp=mice(test,m=4)
Error in str2lang(x) : :1:66: unexpected symbol
1: age ~ gender+T+H+W+IBW+W/IBW+BMI+hypertension+Diabetes+Pulmonary heart
求问这是怎么回事