I am trying to run MICE on my specific variable, specifying which variables that should not be imputed. All my variables are categorical and assigned as factors, so that is why I removed PMM as a method and left it empty so that R will choose the default. After its run, I want to have a complete dataset with the average of these multiple imputations. the pool function is not working with me. please help me it is for my thesis and I tried a lot but it is not working this is my code: