我的代码是这样子的

Ctl<-rpart.control(minsplit=20,maxcompete=4,maxdepth=30,cp=0,01,xval=10)
set.seed(12345)
BoostM<-boosting(GeneralIndex~.,data=zcy,boos=TURE,mfinal=25,coeflearn="Breiman",control=Ctl)
BoostM$importance
ConfM4<-table(zcy$GeneralIndex,boostM$class)
(E3<-(sum(ConfM4)-sum(diag(ConfM4)))/sum(ConfM4))
运行出来后显示参数长度为0，怎么破解啊！！
> BoostM<-boosting(GeneralIndex~.,data=zcy,boos=TURE,mfinal=25,coeflearn="Breiman",control=Ctl)
Error in if (nrow(object$splits) > 0) { : 参数长度为零