Hello,

I am running a Difference-in-difference regression (just regress in stata) on individual high school graduation status. My errors are clustered at Canadian provincial level, which leaves me around 10 clusters among which one of them is the treated group. However, I somehow always get the following error as long as my reps number is higher than 49 (It worked when reps number is below 9 19, 29, 39, 49 ):

boottestModel:: makeNonWREStats():: 3301 subscript invalid

Did anyone encounter something similar ? Do you know the potential problem here? Or could you help me with potential "tests" that I could perform in order to identify the problems?

I work in the RDC environment so I cannot easily replicate the code or results outside of the lab.

Thanks a lot
Xian