Hello, I want to run a MI under MNAR framework using monotone regression model. as for the MNAR, I want to impute all the missing values based on observations from TRT='3' group using the NCMV method with K=2. Attached is my test code. However, it cannot work out, with ERROR ' if the sepcified identification variable W12 in the MODELOBS= option is in the VAR list, it must be completed observed'. Can anyone help to explain this error or sovle this error? thanks. Does it work to specify 2 modelobs options like this?
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