Then realized that the dataframe was too big so did that:
df_small<-subset(df,,select=c(STU_ID, F3ATTAINMENT,F3D21, F3A01C,F3A01D, F3A01E ))
to select a few useful var.
While the df data frame has the expando (blue arrow) on the global environment the sub-dataframe df_small does not. Nothing bad but annoying.
I saw a thread about where it said that the problem has been fixed with a new update but it does not seem to be working for me (my version is 1.2.1335)
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