警告: SFORCE/2 has not been defined in the data set.
警告: One or more of the identifiers in the ID= list in this ACTIVATE/?? command was not found in the dataset. Please check your model to ensure that valid statement/identifier combinations are used.
我想在达成条件时失效一个力，激活另一个力，但是老提醒我这条东西，没有在数据集里定义是什么意思？
